Word Study
gyracanthus
CIDE DICTIONARY
gyracanthus, n. [NL., fr. Gr. gyro`s round + 'a`kanqa spine.].
A genus of fossil fishes, found in Devonian and carboniferous strata; -- so named from their round, sculptured spines. [1913 Webster]
For further exploring for "gyracanthus" in Webster Dictionary Online
