hydroid

== English == === Etymology === From hydro- +‎ -oid. === Noun === hydroid (plural hydroids) Any of many colonial coelenterates that exist mainly as a polyp; a hydrozoan ==== Derived terms ==== tubular sponge hydroid === Adjective === hydroid (not comparable) Of or pertaining to such creatures === Anagrams === dihydro, dihydro-, hydrido