a modified arm of the male of certain cephalopods that is used to transfer sperm to the female.
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How to use hectocotylus in a sentence
Arms long and equal, without membrane; hectocotylus not autotomous.
hectocotylus autotomous; arms unequal in size; aquiferous pores on head and funnel.
British Dictionary definitions for hectocotylus
a tentacle in certain male cephalopod molluscs, such as the octopus, that is specialized for transferring spermatozoa to the female
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012