| holothure | <zoology> A holothurian. Origin: L. Holothuria, pl, a sort of water polyp, Gr. Source: Websters Dictionary (01 Mar 1998) |
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| holothurin | <chemical> A highly toxic saponin occurring in the tropical sea cucumber, holothuriodeae, phylum echinodermata. This marine toxin is an anionic surfactant, haemolyzing red blood corpuscles. It acts irreversibly to destroy the excitability at cholinergic neuromuscular junctions. Chemical name: Holothurin (12 Dec 1998) |
| holothurins | A class of highly toxic sulfated steroid glycosides secreted by sea cucumbers (Holothurioidea). (05 Mar 2000) |
| holothurioidea | <zoology> One of the classes of echinoderms. They have a more or less elongated body, often flattened beneath, and a circle of tentacles, which are usually much branched, surrounding the mouth; the skin is more or less flexible, and usually contains calcareous plates of various characteristic forms, sometimes becoming large and scalelike. most of the species have five bands (ambulacra) of sucker-bearing feet along the sides; in others these are lacking. In one group (Pneumonophora) two branching internal gills are developed; in another (Apneumona) these are wanting. Synonym: Holothurida, Holothuridea, and Holothuroidea. Origin: NL. See Holothure, and -oid. Source: Websters Dictionary (01 Mar 1998) |
| holotricha | <zoology> A group of ciliated Infusoria, having cilia all over the body. Origin: NL, fr. Gr. Whole +, a hair. Source: Websters Dictionary (01 Mar 1998) |
| holotrichous | Possessing cilia over the entire surface. Origin: holo-+ G. Thrix, hair (05 Mar 2000) |
| holotype | <zoology> A single specimen designated or indicated the type specimen by the original author at the time of publication of the original description. (09 Jan 1998) |
| holozoic | Animal-like in mode of obtaining nourishment, lacking photosynthetic capacity; denoting certain protozoans, in distinction to others that are holophytic. Origin: holo-+ G. Zoon, animal (05 Mar 2000) |