| Word | Definitions | Synonyms |
|---|---|---|
| acetabular | (adjective) of the cup-shaped socket that receives the head of the thigh bone | Synonyms: cotyloid, cotyloidal |
| actinomycetal | (adjective) of or belonging to the actinomycetes | Synonyms: actinomycetous |
| cetacean | (adjective) of or relating to whales and dolphins etc | Synonyms: cetaceous |
| cetaceous | (adjective) of or relating to whales and dolphins etc | Synonyms: cetacean |