hydriform

• hydraform

From hydra +‎ -iform.

hydriform (comparative more hydriform, superlative most hydriform)

1. (archaic, zoology) Having the form or structure of a hydra.

• “hydriform”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• “hydriform, adj.”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000.