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 echinoderm is as below...

Echinodermata :: Echinodermata (n. pl.) One of the grand divisions of the animal kingdom. By many writers it was formerly included in the Radiata.

Crinoidea :: Crinoidea (n. pl.) A large class of Echinodermata, including numerous extinct families and genera, but comparatively few living ones. Most of the fossil species, like some that are recent, were attached by a jointed stem. See Blastoidea, Cystoidea, Comatula..

Periproct :: Periproct (n.) The region surrounding the anus, particularly of echinoderms..

Starfish :: Starfish (n.) Any one of numerous species of echinoderms belonging to the class Asterioidea, in which the body is star-shaped and usually has five rays, though the number of rays varies from five to forty or more. The rays are often long, but are sometimes so short as to appear only as angles to the disklike body. Called also sea star, five-finger, and stellerid..

Echinodermatous :: Echinodermatous (a.) Relating to Echinodermata; echinodermal.

Bivium :: Bivium (n.) One side of an echinoderm, including a pair of ambulacra, in distinction from the opposite side (trivium), which includes three ambulacra..

Echinodermal :: Echinodermal (a.) Relating or belonging to the echinoderms.

Holothurioidea :: Holothurioidea (n. pl.) One of the classes of echinoderms.

Ophiuroidea :: Ophiuroidea (n. pl.) A class of star-shaped echinoderms having a disklike body, with slender, articulated arms, which are not grooved beneath and are often very fragile; -- called also Ophiuroida and Ophiuridea. See Illust. under Brittle star..

Perisome :: Perisome (n.) The entire covering of an invertebrate animal, as echinoderm or coelenterate; the integument..

Asteridea :: Asteridea (n. pl.) A class of Echinodermata including the true starfishes. The rays vary in number and always have ambulacral grooves below. The body is star-shaped or pentagonal.

Ossicle :: Ossicle (n.) One of numerous small calcareous structures forming the skeleton of certain echinoderms, as the starfishes..

Umbo :: Umbo (n.) A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larvae of echinoderms or in the tympanic membrane of the ear..

Sea Urchin :: Sea urchin () Any one of numerous species of echinoderms of the order Echinoidea.

Stelleridan :: Stellerida (n. pl.) An extensive group of echinoderms, comprising the starfishes and ophiurans..

Echinoderm :: Echinoderm (n.) One of the Echinodermata.

Interambulacrum :: Interambulacrum (n.) In echinoderms, one of the areas or zones intervening between two ambulacra. See Illust. of Ambulacrum..

Ambulacral :: Ambulacral (a.) Of or pertaining to ambulacra; avenuelike; as, the ambulacral ossicles, plates, spines, and suckers of echinoderms..

Echinozoa :: Echinozoa (n. pl.) The Echinodermata.

Fission :: Fission (n.) A process by which certain coral polyps, echinoderms, annelids, etc., spontaneously subdivide, each individual thus forming two or more new ones. See Strobilation..

Random Fonts

Most Popular