achaian
- n a member of one of four linguistic divisions of the prehistoric Greeks
acerola
- n tropical American shrub bearing edible acid red fruit resembling cherries
- n acid red or yellow cherry-like fruit of a tropical American shrub very rich in vitamin C
acervulus
- n small asexual fruiting body resembling a cushion or blister consisting of a mat of hyphae that is produced on a host by some fungi
acetabulum
- n the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint
acetal
- n any organic compound formed by adding alcohol molecules to aldehyde molecules
acetaldehyde
- n a colorless volatile water-soluble liquid aldehyde used chiefly in the manufacture of acetic acid and perfumes and drugs