A specific arm of a male octopus, cuttlefish, or other cephalopod, which becomes modified at sexual maturity so that it can transfer sperm to the female.
Webster's New World
Other Word Forms of Hectocotylus
Origin of Hectocotylus
New Latin hecto– Greek kotulē small cup
From American Heritage Dictionary of the English Language, 5th Edition
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Words Starting With H and Ending With S