| dinmont | <zoology> A wether sheep between one and two years old. Source: Websters Dictionary (01 Mar 1998) |
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| dinner pad | A pad of moderate thickness placed over the pit of the stomach before the application of a plaster jacket; after the plaster has set the pad is removed, leaving space for varying degrees of abdominal distention. (05 Mar 2000) |
| dinoceras | <paleontology> A genus of large extinct Eocene mammals from Wyoming. They were herbivorous, and remarkable for three pairs of hornlike protuberances on the skull. The males were armed with a pair of powerful canine tusks. Synonym: Uintatherium. Origin: NL, fr. Gr. Terrible +, horn. Source: Websters Dictionary (01 Mar 1998) |
| dinoflagellate | Photosynthetic organisms of the order Dinoflagellida (for botanists Dinophyceae). They are aquatic and have 2 flagella lying in grooves in an often elaborately sculptured shell or pellicle that is formed from plates of cellulose deposited in membrane vesicles. The pellicle gives some dinoflagellates very bizarre shapes. Their chromosomes lack centromeres and may have little or no protein and may perhaps be intermediate between pro and eu karyote types, hence the group has been termed mesokaryotic. The nuclear membrane persists during mitosis. They are very abundant in marine plankton. Gymnodinium and Gonyaulax, that causes red tide, produce toxins that if accumulated by filter feeding molluscs can be fatal. Another common genus is Peridinium. (18 Nov 1997) |
| dinoflagellate toxin | A potent neurotoxin that is thought to act similarly to botulinus toxin by impairing the synthesis or the release of acetylcholine. (05 Mar 2000) |
| dinoflagellida | Protozoans of the class phytomastigophora, found mainly in the oceans. They are characterised by the presence of transverse and longitudinal flagella which propel the organisms in a rotating manner through the water. (12 Dec 1998) |
| dinoprost | <chemical> 7-(3,5-dihydroxy-2-(3-hydroxy-1-octenyl)cyclopentyl)-5-heptenoic acid. A natural prostaglandin f analog that has oxytocic, luteolytic, and abortifacient activities. Due to its vasocontractile properties, the compound has a variety of other biological actions. Pharmacological action: abortifacient agents, non-steroidal, oxytocics. Chemical name: Prosta-5,13-dien-1-oic acid, 9,11,15-trihydroxy-, (5Z,9alpha,11alpha,13E,15S)- (12 Dec 1998) |
| dinoprost tromethamine | An oxytocic agent. Synonym: prostaglandin F2a tromethamine. (05 Mar 2000) |
| dinoprostone | <chemical> 7-(3-hydroxy-2-(3-hydroxy-1-octenyl)-5-oxocyclopentyl)-5-heptenoic acid. The most common and most biologically active of the mammalian prostaglandins. It exhibits most biological activities characteristic of prostaglandins and has been used extensively as an oxytocic agent. The compound also displays a protective effect on the intestinal mucosa. Pharmacological action: oxytocics. Chemical name: Prosta-5,13-dien-1-oic acid, 11,15-dihydroxy-9-oxo-, (5Z,11alpha,13E,15S)- (12 Dec 1998) |
| dinormocytosis | An obsolete term for isonormocytosis. (05 Mar 2000) |
| dinornis | <paleontology> A genus of extinct, ostrichlike birds of gigantic size, which formerly inhabited New Zealand. See Moa. Origin: NL, fr. Gr. Terrible + bird. Source: Websters Dictionary (01 Mar 1998) |
| dinosauria | <paleontology> An order of extinct mesozoic reptiles, mostly of large size (whence the name). Notwithstanding their size, they present birdlike characters in the skeleton, especially. In the pelvis and hind limbs. Some walked on their three-toed hind feet, thus producing the large "bird tracks," so-called, of mesozoic sandstones; others were five-toed and quadrupedal. Origin: NL, fr. Gr. Terrible + lizard. Source: Websters Dictionary (01 Mar 1998) |
| dinosaurian | <paleontology> One of the Dinosauria. Origin: Gr. Terrible + lizard. Source: Websters Dictionary (01 Mar 1998) |
| dinotherium | <paleontology> A large extinct proboscidean mammal from the miocene beds of Europe and Asia. It is remarkable fora pair of tusks directed downward from the decurved apex of the lower jaw. Origin: NL. Dinotherium, fr. Gr. Terrible + beast. Source: Websters Dictionary (01 Mar 1998) |
| dinoxide | <chemistry> Same as Dioxide. Source: Websters Dictionary (01 Mar 1998) |