ζύγαινα

ης, ἡ
A. the hammer-headed shark, Epich. 59, Arist. HA 506b10, Philotim. ap. Gal. 6.727, Ael. NA 9.49, Opp. H. 1.367.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project