A = A (lettre de l'alphabet)

Aa

aargh = aargh (interjection)

Ab

abaca = abaca
abacus = abaque (1. graphe; 2. boulier compteur)
abandon = abandon, abandonner
abase = abaisser (sens moral)
abatis ou abattis = abattis
abattoir = abattoir
Abbasid = Abbasside
abbatial = abbatial
abbé = abbé (français)
abbess = abbesse
Abbevillian = abbevillien (Archéol.)
abbey = abbaye
abbot = abbé (chef d'abbaye)
abbreviate = abrévier
abbreviation = abréviation
ABC = ABC (alphabet)
abdicate = abdiquer
abdomen = abdomen
abecedarian = abécédaire
abelian = abélien (Math.)
aberrant = aberrant
aberration = aberration
abhor = abhorrer
ab initio = ab initio
abiogenesis = abiogenèse
abiotic = abiotique
abject = abject
abjure = abjurer
Abkhaz = abkhaze
Abkhazia = Abkhazie
ablation = ablation
ablative = ablatif
ablative absolute = ablatif absolu
ablution = ablution utilisé le plus souvent au pluriel dans les deux langues)
abnegation = abnégation
abnormal = anormal
abnormality = anormalité
aboard = à bord
abolish = abolir
abolition = abolition
abolitionist = abolitionniste
abominable = abominable
abominate = abominer
abomination = abomination
aboriginal = aborigène
abort = avorter
abortive = abortif
abounder = abonder
ab ovo = ab ovo
abracadabra = abracadabra
abrade = abrader
abrasion = abrasion
abrasive = abrasif
abreact = abréagir
abreaction = abréaction
abridge = abréger
abrogate = abroger
abrogation = abrogation
abrupt = abrupt
Abruzzi = Abruzzes
abscess = abcès
abscissa = abscisse
absence = absence
absent = absent
absenteeism = absentéisme
absinth = absinthe
absolute = absolu
absolute magnitude = magnitude absolue (Astron.)
absolute majority = majorité absolue
absolute temperature = température absolue
absolute value = valeur absolue
absolute zero = zéro absolu
absolution = absolution
absolutism = absolutisme
absolve = absoudre
absorb = absorber
absorbed dose = dose absorbée (Phys.; Méd.)
absorbent = absorbant (aussi: hydrophile)
absorption = absorption
absorption spectrum = spectre d'absorption (Spectrogr.)
abstain = s'abstenir
abstention = abstention
abstinence = abstinence
abstinent = abstinent
abstract = abstrait, abstraire (sens plus vaste en anglais)
absract art = art abstrait
abstract expressionism = expressionnisme abstrait
abstraction = abstraction
abstruse = abstrus
absurd = absurde
absurdity = absurdité
abulia or aboulia = aboulie
abundance = abondance
abundant = abondant
abuse = abus, abuser
abuser = abuseur
abysm = abîme
abysmal = abysmal
abyss = abysse
abyssal = abyssal

Ac

acacia = acacia
academical = académique
academician = académicien
academicism = académisme
academic year = année académique
Académie française = Académie française
academy = académie
Acadia = Acadie
Acadian = acadien
acajou = acajou
acalculia = acalculie
Acanthocephala = acanthocéphales (Zool.)
acanthus = acanthe; feuille d'acanthe
a cappella = a cappella
Acari ou Acarina = acariens (Zool.)
accede = accéder
accelerando = accelerando, accélérando
accelerate = accélérer
acceleration = accélération
accelerator = accélérateur
accelerometer = accéléromètre
accent = accent, accentuer
accented = accentué
accentuate = accentuer
accept = accepter
acceptable = acceptable
access = accès
accessible = accessible
accession = accession
accessory = accessoire
access time = temps d'accès (Inform.)
accident = accident
accidental = accidentel
acclaim = acclamer
acclamation = acclamation
acclimate ou acclimatize = acclimater
accolade = accolade
accomodate = accommoder
accompaniment = accompagnement (Mus.)
accompany = accompagner
accomplice = complice
accomplish = accomplir
accomplished = accompli
accomplishment = accomplissement
accord = accord, accorder
accordion = accordéon
accost = accoster
accouchement = accouchement
accoucheur = accoucheur (sage-femme mâle, sic)
accoutrement = accoutrement
accredit = accréditer
accredited = accrédité
accretion = accrétion
acculturate = acculturer
accumulate = accumuler
accumulation = accumulation
accumulator = accumulateur
accusation = accusation
accusative = accusatif
accusatory = accusatoire
accuse = accuser
accused = accusé (Jur.: subst.)
accustom = accoutumer
ace = as (tous sens); ace (jeux de balle)
acellular = acellulaire
acentric = acentrique (Géométrie; Génétique)
acephalous = acéphale
acerbic ou acerb = acerbe
acetaldehyde = acétaldéhyde
acetate = acétate
acetic acid = acide acétique
acetone = acétone
acetyl = acétyl-, acétyle
acetylcholine = acétylcholine
acetylcholinesterase = acétylcholinestérase
acetyl coenzyme A = acétyl-coenzyme A (Biochim.)
acetylene = acétylène
acetylsalicylic acid = acide acétylsalicylique
Achaean = achéen
Achaemenid = achéménide
Achernar = Achernar (Astron.)
Acheulian = acheuléen (Archéol.)
achillea = achillée
Achilles = Achille
Achilles tendon = tendon d'Achille
achiral = achiral (Chim.)
achondroplasia = achondroplasie (Méd.)
achromatic = achromatique
acid = acide
acidify = acidifier
acidimetry = acidimétrie
acidity = acidité
acidophil = acidophile (Physiol.; subst.)
acidophilic = acidophile (Physiol.; adj.)
acidosis = acidose
acid salt = sel acide (Chim.)
acidulous = acidulé
acme = acmé (Hist. gr.: sommet)
acne = acné
acolyte = acolyte
aconite = aconit
aconitine = aconitine
acoustic = acoustique
acoustic coupler = coupleur acoustique
acoustician = acousticien
acquiesce = acquiescer
acquire = acquérir
acquired character ou acquired characteristic = caractère acquis
acquired immune deficiency syndrome (AIDS) = syndrome immuno-déficitaire acquis (SIDA)
acquisition = acquisition
acquit = acquit (Comm.: subst.), acquitter (Jur.: vt)
acre = acre (mesure agraire, obsolète dans les pays de langue française sauf au Canada)
acrid = âcre
acrimonious = acrimonieux
acrimony = acrimonie
acrobat = acrobate
acrobatic = acrobatique
acrocyanosis = acrocyanose (Méd.)
acrolect = acrolecte (Ling.)
acromegaly = acromégalie (Med., Anthropol.)
acronym = acronyme
acrophobia = acrophobie
acropolis = acropole
acrostic = acrostiche
Acrux = Acrux (Astron.)
acrylamide = acrylamide
acrylic = acrylique
acrylic acid = acide acrylique
acrylonitrile = acrylonitrile
Actaeon = Actéon
actin = actine
actinian = actinie
actinic = actinique (Photo.)
actinide = actinide (Chim.)
actinium = actinium
actinometer = actinomètre
actinomycete = actinomycète (Microbiol.)
action = action
action at a distance = action à distance
Action Directe = Action Directe
Actium (Battle of) = Actium (Bataille d')
activate = activer
activated carbon ou active carbon = charbon actif, carbone actif
activation energy = énergie d'activation (Chim.)
active = actif
activism = activisme
activity = activité
act of contrition = acte de contrition
actomyosine = actomyosine (Biochim.)
actor = acteur
actress = actrice
actuary = actuaire
acuity = acuité
acupuncture = acupuncture, acuponcture
acute = aigu
acute accent = accent aigu
acyclic = acyclique
acyl = acyle

Ad

adage = adage
adagio = adagio
adapt = adapter
adaptable = adaptable
adaptation = adaptation
addendum = addendum
addition = addition
additional = additionnel
addition reaction = réaction d'addition (Chim.)
additive = additif (n. et adj.)
address = adresse, adresser, s'adresser à
adressable = adressable (Inform.)
adductor = adducteur (Anat.)
adenine = adénine
adenocarcinoma = adénocarcinome (Méd.)
adenosine = adénosine
adenosine deaminase = adénosine-déaminase
adenosine monophosphate = adénosine monophosphate
adenosine triphosphate = adénosine triphosphate
adenovirus = adénovirus
adenylate cyclase = adénylate-cyclase
adenylic acid = acide adénylique
adept = adepte
adequate = adéquat
adhere = adhérer
adherent = adhérent
adherence = adhérence
adhesion = adhésion
adhesive = adhésif
ad hoc = ad hoc
ad hominem = ad hominem
adiabatic = adiabatique
adieu = adieu
ad infinitum = ad infinitum
ad interim = ad interim, ad intérim
adipic acid = acide adipique (Chim.)
adipocyte = adipocyte (Biol.)
adipose = adipeux
adjacent = adjacent
adjective = adjectif
adjoin = adjoindre
adjourn = ajourner
adjure = adjurer
adjust = ajuster
adjuvant = adjuvant
ad libitum = ad libitum
administer = administrer
administration = administration
administrative = administratif
administrator = administrateur
administratrix = administratrice (Dr. immob.)
admirable = admirable
admiral = amiral
Admiral of the Fleet = Amiral de la Flotte (grade britannique équivalent à Amiral de France)
Admiralty = Amirauté
admiration = admiration
admire = admirer
admissible = admissible
admission = admission
admit = admettre
admixture = admixtion
admonition = admonition
admonitory = admonitoire
ad nauseam = ad nauseam
adobe = adobe
adolescence = adolescence
adolescent = adolescent
Adonai = Adonai (Théol. hébr.)
Adonis = Adonis (Mythol. gr.)
adopt = adopter
adoption = adoption
adoptive = adoptif
adorable = adorable
adore = adorer
ad rem = ad rem (Philos.)
adrenaline = adrénaline
adrenergic = adrénergique (Neurophysiol.)
adrenocorticotrophic hormone (ACTH) = hormone adrénocorticotrophique (ACTH)
adret = adret (Géogr.)
Adriatic = adriatique
advance = avancer
adrift = à la dérive
adroit = adroit
adsorb = adsorber
adsorbate = adsorbat
adsorbent = adsorbant
adstratum = adstrat
adulate = aduler
adulation = adulation
adult = adulte
adulterant = adultérant
adulterate = adultérer
adulterine = adultérin
advance = avance, avancer
advanced = avancé (à un stage avancé)
advance guard = avant-garde
advantage = avantage
advantaged = avantagé
advection = advection
advent = avènement
Advent = Avent
Adventist = adventiste
adventure = aventure
adventurer = aventurier
adverb = adverbe
adverbial = adverbial
adversary = adversaire
adversative = adversatif (Gramm.)
adverse = adverse
adversity = adversité
advised = avisé
advocaat = advocaat
advocate = avocat (sauf Bot.)
adytum = adytum (Archéol. gr.)

Ae

Aegean = égéen
aegis = égide
Aegisthus = Égisthe
Aeneas = Énée
Aeneid (the) = Énéide (l')
aeolian = éolien
aelioan harp = harpe éolienne
Aeolus = Éole
aerate = aérer
aerie ou eyrie = aire (d'un aigle)
aerobic = aérobique (Microbiol. et Physiol.)
aerodrome = aérodrome
aerodynamic = aérodynamique (adj.)
aerodynamics = aérodynamique (n.f.)
aerogram = aérogramme (Postes)
aeromodelling = aéromodélisme
aeronaut = aéronaute
aeronautic ou aeronautical = aéronautique (adj.)
aeronautics = aéronautique (n.f.)
aerophagy = aérophagie
aeroplane = aéroplane
aerosol = aérosol
aerostat = aérostat
Aeschylus = Eschyle
Aesculapian = esculapien, d'Esculape
Aesop = Ésope
aesthete ou esthete = esthète
aesthetic ou esthetic = esthétique (adj.)
aesthetics ou esthetics = esthétique (n.f.)
aestival ou estival = estival
aestivation ou estivation = estivation (Zool.)
aetiology ou etiology = étiologie

Af

Afar = afar (Anthropol.)
affable = affable
affairé = affairé
affect = affecter (1. avoir une influence; 2. faire semblant); affect (Psychol.)
affectation = affectation
affected = affecté
affection = affection
affectionate = affectionné
affective = affectif
afferent = afférent (Physiol.)
affiliation = affiliation
affine = affine (Géom.; en Belg. aussi "affin")
affinity = affinité
affirm = affirmer
affirmation = affirmation
affirmative = affirmatif
afflux = afflux
affricate = affriqué (Phon.)
affront = affront
Afghan = afghan
Aghanistan = Afghanistan
aficionado = aficionado
afloat = à flot
a fortiori = a fortiori
afreet ou afrit = efrit (Mythol. arabo-persane)
Africa = Afrique
African = africain
African elephant = éléphant d'Afrique
Afrikaans = afrikaans
Afro = afro (style de chevelure)