Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of hydroid is as below...

Hydrina :: Hydrina (n. pl.) The group of hydroids to which the fresh-water hydras belong.

Gonosome :: Gonosome (n.) The reproductive zooids of a hydroid colony, collectively..

Palpocil :: Palpocil (n.) A minute soft filamentary process springing from the surface of certain hydroids and sponges.

Tubularia :: Tubularia (n.) A genus of hydroids having large, naked, flowerlike hydranths at the summits of long, slender, usually simple, stems. The gonophores are small, and form clusters at the bases of the outer tentacles..

Planoblast :: Planoblast (n.) Any free-swimming gonophore of a hydroid; a hydroid medusa.

Medusoid :: Medusoid (a.) Like a medusa; having the fundamental structure of a medusa, but without a locomotive disk; -- said of the sessile gonophores of hydroids..

Hydrophora :: Hydrophora (n. pl.) The Hydroidea.

Athecata :: Athecata (n. pl.) A division of Hydroidea in which the zooids are naked, or not inclosed in a capsule. See Tubularian..

Sea Ginger :: Sea ginger () A hydroid coral of the genus Millepora, especially M. alcicornis, of the West Indies and Florida. So called because it stings the tongue like ginger. See Illust. under Millepore..

Zoophyte :: Zoophyte (v. i.) Any one of numerous species of invertebrate animals which more or less resemble plants in appearance, or mode of growth, as the corals, gorgonians, sea anemones, hydroids, bryozoans, sponges, etc., especially any of those that form compound colonies having a branched or treelike form, as many corals and hydroids..

Zooid :: Zooid (n.) One of the individual animals in a composite group, as of Anthozoa, Hydroidea, and Bryozoa; -- sometimes restricted to those individuals in which the mouth and digestive organs are not developed..

Gymnophthalmata :: Gymnophthalmata (n. pl.) A group of acalephs, including the naked-eyed medusae; the hydromedusae. Most of them are known to be the free-swimming progeny (gonophores) of hydroids..

Periderm :: Periderm (n.) The hard outer covering of hydroids and other marine animals; the perisarc.

Calicle :: Calicle (n.) One of the small cuplike cavities, often with elevated borders, covering the surface of most corals. Each is formed by a polyp. (b) One of the cuplike structures inclosing the zooids of certain hydroids. See Campanularian..

Meconidium :: Meconidium (n.) A kind of gonophore produced by hydroids of the genus Gonothyraea. It has tentacles, and otherwise resembles a free medusa, but remains attached by a pedicel..

Hydrorhiza :: Hydrorhiza (n.) The rootstock or decumbent stem by which a hydroid is attached to other objects. See Illust. under Hydroidea.

Velum :: Velum (n.) The circular membrane that partially incloses the space beneath the umbrella of hydroid medusae.

Hydrotheca :: Hydrotheca (n.) One of the calicles which, in some Hydroidea (Thecaphora), protect the hydrants. See Illust. of Hydroidea, and Campanularian..

Tubularida :: Tubularida (n. pl.) An extensive division of Hydroidea; the tubularians; -- called also Athecata, Gymnoblastea, and Tubulariae..

Blastostyle :: Blastostyle (n.) In certain hydroids, an imperfect zooid, whose special function is to produce medusoid buds. See Hydroidea, and Athecata..

Random Fonts

Most Popular