| Word | Definitions | Synonyms |
|---|---|---|
| argil | (noun) a white clay (especially a white clay used by potters) | - |
| argillite | (noun) a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages | - |
| arginine | (noun) a bitter tasting amino acid found in proteins and necessary for nutrition; its absence from the diet leads to a reduced production of spermatozoa | - |