pseudoproct

plural pseudoprocts

1. biologyThe anal opening on the pseudembryo of an echinoderm.

   The larva now fixes itself by the 'pseudoproct.'

   1888, British Association for the Advancement of Science, Report, page 735

   3 more examples

   The pseudostome and pseudoproct become obscure and are shortly obliterated, the sarcoid forming a thick, smooth, uniform layer over the stem and over its terminal disk.

   1865, Philosophical Transactions of the Royal Society of London, page 524

   The pseudembryo moves rapidly in the water, rolling round and swinging from side to side ; as a rule, and especially when at rest, the surface bearing the pseudostome and pseudoproct is turned downwards.

   1866, The Record of Zoological Literature, page 759

   The pseudembryo or echinopzrdium, at first cilisted and spheroidal, becomes after a time wedge-shaped; at its broad end appears the mouth or psaudostome, and at the other the anus or pseudoproct.

   1878, Thomas Spencer Baynes, The Encyclopedia Britannica

2. biologyA false osculum or secondary opening which replaces the original osculum of a sponge.