- The definition of a hectocotylus is a specific arm of a cephalopod that transfers sperm to the female.
An example of hectocotylus is what a male octopus uses to get a female octopus pregnant.
hectocotylus definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
noun pl. hectocotyli
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
Origin: Modern Latin ; from hecto- plush Classical Greek kotylē, a hollow, cavity
hectocotylus definition by American Heritage Dictionary
noun pl. hec·to·cot·y·li
A modified arm of the male of certain cephalopods, such as the octopus, functioning as a reproductive organ in the transference of sperm to the mantle cavity of the female.
Origin: New Latin : hecto- + Greek kotulē, small cup.