ˌidē(ˌ)ōsəˈpīəˌdē noun plural
Usage: capitalized
Etymology: New Latin, from Idiosepion or Idiosepius, type genus (from idio- + Greek sēpion cuttlefish bone) + -idae — more at sepia
: a family of squids that includes a single tiny squid ( Idiosepius pygmaeus or Idiosepion pygmaeum ) of the Indian ocean which lacks an internal shell and is considerably less than an inch in length