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.
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 of hectocotylusModern Latin ; from hecto- + Classical Greek kotylē, a hollow, cavity
A modified arm of the male of certain cephalopods, such as most octopuses, functioning as a reproductive organ in transferring sperm to the mantle cavity of the female.
Origin of hectocotylusNew Latin : hecto– + Greek kotulē, small cup.