- the terminal part of a hydroid polyp that bears the mouth and tentacles and contains the stomach region.
Origin of hydranth
1870–75; hydr(a) + Greek ánth(os) flower
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for hydranth
As a general rule polyp-buds are produced from the hydrorhiza and hydrocaulus, while medusa-buds are formed on the hydranth.
Speaking generally, three principal types of hydranth can be distinguished, each with subordinate varieties of form.
Hydranth more shortened, daisy-like in form, with two whorls of tentacles, oral and aboral.
Hydranth with tentacles reduced below four; type of Lar (fig. 11), Monobrachium, &c.
In both cases the hydranth is extremely reduced and has no tentacles, and the polyp forms a colony by budding from the base.
- a polyp in a colony of hydrozoan coelenterates that is specialized for feeding rather than reproduction
C19: from hydra + Greek anthos flower
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