Hydrorhiza

• (n.) The rootstock or decumbent stem by which a hydroid is attached to other objects. See Illust. under Hydroidea.
Found on http://thinkexist.com/dictionary/meaning/hydrorhiza/

Hydrorhiza

Hy`dro·rhi'za noun ; plural Latin Hydrorhizæ , English Hydrorhizas . [ New Latin , from English hydra + Greek ... a root.] (Zoology) The rootstock or decumbent stem by which a hydroid is attached to other objects. See Illust. under Hydroidea ....
Found on http://www.encyclo.co.uk/webster/H/77
No exact match found