frog shell
noun
Any of various large marine gastropod molluscs allied to the tritons and having a heavily built knobbly shell, now mostly placed in the family Bursidae.
Origin
Mid 19th century; earliest use found in Samuel Woodward (1821–1865), naturalist and palaeontologist.
- acetic anhydride
- acetic ether
- acetic fermentation
- acetic series
- acetification
- acetifier
- acetify
- acetifying
- acetin
- aceto-
- acetoacetate
- acetoacetic acid
- acetoacetic ester
- acetobacter
- well-colored
- well-coloured
- well-commended
- well-compacted
- well-complexioned
- well-composed
- well-concealed
- well-conceived
- well-concerted
- well-concocted
- well-conditioned