| Acid house | Acid house |
| Acid Pro Loop | ACID Pro |
| Acid techno | Acid techno |
| Acid test | The Electric Kool-Aid Acid Test |
| Acid trance | Acid trance |
| acide | acerbic |
| Acide abscissique | Abscisin |
| acide acétique | acetic acid |
| acide acétylacétique | acetoacetic acid |
| acide acétylsalicylique | acetylsalicylic acid |
| Acide alpha hydroxylé | Alpha hydroxy acid |
| acide aminé | amino acid |
| Acide anhydride | Carbonic acid |
| Acide arachidonique | Arachidonic acid |
| acide ascorbique | ascorbic acid |
| acide azotique | nitric acid |
| acide benzoïque | benzoic acid |
| acide borique | boric acid |
| acide butyrique | butyric acid |
| acide caprique | capric acid |
| acide carbonique | carbonic acid |
| acide carboxylique | carboxylic acid |
| acide chlorhydrique | hydrochloric acid |
| acide chlorique | chloric acid |
| acide citrique | citric acid |
| acide crotonique | crotonic acid |
| Acide de Caro | Peroxymonosulfuric acid |
| Acide de Lewis | Lewis acid |
| Acide dichloroacétique | Dichloroacetic acid |
| acide dilué | diluted acid |
| acide désoxyribonucléique | DNA |
| Acide ellagique | Ellagic acid |
| Acide faible | Weak acid |
| Acide fluoroantimonique | Fluoroantimonic acid |
| Acide fluorosulfurique | Fluorosulfuric acid |
| Acide folinique | Folinic acid |
| acide folique | folic acid |
| acide formique | formic acid |
| Acide fort | Strong acid |
| acide gallique | gallic acid |
| acide gastrique | gastric acid |
| acide gluconique | gluconic acid |
| Acide glucuronique | Glucuronic acid |
| Acide glutamique | Glutamic acid |
| acide gras | fatty acid |
| Acide gras essentiel | Essential fatty acid |
| acide gras saturé | saturated fatty acid |
| Acide halohydrique | Hydrogen halide |
| Acide hexachloroplatinique hexahydraté | Dihydrogen hexachloroplatinate hexahydrate |
| Acide hyaluronique | Hyaluronan |
| Acide iduronique | Iduronic acid |
| Acide kaïnique | Kainic acid |
| Acide lactique | Lactic acid |
| Acide mandélique | Mandelic acid |
| Acide minéral | Mineral acid |
| Acide méthanoïque | Formic acid |
| Acide mévalonique | Mevalonic acid |
| acide nitrique | nitric acid |
| Acide nucléique | Nucleic acid |
| acide nucléïque | nucleic acid |
| acide palmique | ricinoleic acid |
| Acide paratoluènesulfonique | P-Toluenesulfonic acid |
| Acide peracétique | Peracetic acid |
| Acide permanganique | Manganese oxide |
| Acide phosphorique | Phosphoric acid |
| Acide phytique | Phytic acid |
| Acide polylactique | Polylactic acid |
| acide prussique | prussic acid |
| acide ribonucléique | RNA |
| Acide ribonucléique messager | Messenger RNA |
| Acide ribonucléique ribosomique | Ribosomal RNA |
| Acide résinique | Resin acid |
| acide salicylique | salicylic acid |
| Acide stéatique | Fatty acid |
| acide sulfureux | sulfurous acid |
| acide sulfurique | vitriol |
| acide tannique | tannic acid |
| acide tartrique | tartaric acid |
| Acide teichoïque | Teichoic acid |
| Acide trifluoroacétique | Trifluoroacetic acid |
| Acide trifluorométhanesulfonique | Trifluoromethanesulfonic acid |
| acide urique | uric acid |
| Acide uronique | Uronic acid |
| acide valérique | valeric acid |
| Acide α-linolénique | Alpha-linolenic acid |
| Acide γ-linolénique | Gamma-Linolenic acid |
| Acide-aminé | Amino acid |
| acidifiable | acidifiable |
| acidification | acidification |
| Acidification de l’océan | Ocean acidification |
| acidifier | acidify |
| acidimétrie | acidimetry |
| acidité | acidity |
| Acidogénèse | Acidogenesis |
| Acidophile | Acodophilous |
| acidose | acidosis |
| Acidose tubulaire rénale | Renal tubular acidosis |
| aciduler | acidulate |
| acidulé | biting |
| acidulée | acidulous |
| Acidurie fumarique | Fumarase deficiency |
| acier | steel |
| Acier Corten | Weathering steel |
| Acier inoxidable | Stainless steel |
| acier inoxydable | stainless steel |
| Acier rapide | High speed steel |
| Acier soudé | Weld steel |
| Acigné | Acigné |
| Acilii | Acilius |
| acinaciforme | acinaciform |
| acinoforme | aciniform |
| Acinonychinae | Cheetah |
| acinétique | akinesic |
| Acipenser baerii | Siberian sturgeon |
| Acipenser brevirostrum | Shortnose sturgeon |
| Acipenser oxyrinchus | Atlantic sturgeon |
| Acipenseridae | Acipenseridae |
| Acipenseriformes | Acipenseriformes |
| Acireale | Acireale |
| Acis | Acis |
| Aciérage | Steel |
| Aciération | Steel |
| aciérer | caseharden |
| aciérie | steelworks |
| aciéré | case-hardened |
| Acklins | Acklins |
