hydroid |
<zoology> Related to, or resembling, the hydra; of or pertaining to the Hydroidea. One of the Hydroideas. Origin: Hydra. Source: Websters Dictionary (01 Mar 1998) |
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hydroidea |
<zoology> An extensive order of Hydrozoa or Acalephae. Alternative forms: Hydroida. This order includes the hydras and the free-swimming hydromedusae, together with a great variety of marine attached hydroids, many of which grow up into large, elegantly branched forms, consisting of a vast number of zooids (hydranths, gonophores, etc), united by hollow stems. All the zooids of a colony are produced from one primary zooid, by successive buddings. The Siphonophora have also been included in this order by some writers. See Gymnoblastea, Hydromedusa, Gonosome, Gonotheca. Origin: NL. See Hydra, and -oid. Source: Websters Dictionary (01 Mar 1998) |
hydrokinetic |
Pertaining to the motion of fluids and the forces giving rise to such motion. (05 Mar 2000) |
hydrokinetics |
That branch of kinetics concerned with fluids in motion. (05 Mar 2000) |
hydrolabile |
Unstable in the presence of water. (05 Mar 2000) |
hydrolability |
A state in which the fluid in the tissues readily changes in amount. (05 Mar 2000) |
hydrolase |
<enzyme> One of a class of enzymes (EC Class 3) catalysing hydrolysis of a variety of bonds, such as esters, glycosides, peptides. (18 Nov 1997) |
hydrolases |
<enzyme> Registry number: EC 3. (12 Dec 1998) |
hydrological |
Of or pertaining to hydrology. Source: Websters Dictionary (01 Mar 1998) |
hydrologist |
One skilled in hydrology. Source: Websters Dictionary (01 Mar 1998) |
hydrology |
<study> The science of water, its properties, phenomena, and distribution over the earth's surface. Origin: Hydro-, 1: cf. F. Hydrologie Source: Websters Dictionary (01 Mar 1998) |
hydrolymph |
The circulating fluid in many of the invertebrates. (05 Mar 2000) |
hydrolysate |
<chemistry> The product of a hydrolysis reaction. Hydrolysates are generally named according to what reactant was hydrolysed to come up with the product, for example protein hydrolysate if the reactant was a protein. (09 Oct 1997) |
hydrolysis |
<chemistry> The splitting of a compound into fragments by the addition of water, the hydroxyl group being incorporated in one fragment and the hydrogen atom in the other. Origin: Gr. Lysis = dissolution (18 Nov 1997) |
hydrolytic |
<chemistry> Tending to remove or separate water; eliminating water. "Hydrolytic agents, such as sulphuric acid or caustic alkali." (Encyc. <physiology> Brit) Hydrolitic ferment, a ferment, enzyme, or chemical ferment, which acts only in the presence of water, and which causes the substance acted upon to take up a molecule of water. Thus, diastase of malt, ptyalin of saliva, and boiling dilute sulphuric acid all convert starch by hydration into dextrin and sugar. Nearly all of the digestive ferments are hydrolytic in their action. Origin: Hydro-, 1 + Gr. To loose. Source: Websters Dictionary (01 Mar 1998) |