| bathyphyll | A leaf at the base of a stem with the function of attachment to a substrate. (09 Oct 1997) |
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| batoidei | <zoology> The division of fishes which includes the rays and skates. Origin: NL, fr. Gr. A kind of ray. Source: Websters Dictionary (01 Mar 1998) |
| batrachia | <zoology> The order of amphibians which includes the frogs and toads; the Anura. Sometimes the word is used in a wider sense as equivalent to Amphibia. Origin: NL, fr. Gr. Belonging to a frog, fr. Frog. Source: Websters Dictionary (01 Mar 1998) |
| batrachian | <zoology> Pertaining to the Batrachia. One of the Batrachia. Source: Websters Dictionary (01 Mar 1998) |
| batrachoid | <zoology> Froglike. Specifically: Of or pertaining to the Batrachidae, a family of marine fishes, including the toadfish. Some have poisonous dorsal spines. Origin: Batrachia. Source: Websters Dictionary (01 Mar 1998) |
| batrachomyomachy | The battle between the frogs and mice; a Greek parody on the Iliad, of uncertain authorship. Origin: Gr.; frog + mouse + battle. Source: Websters Dictionary (01 Mar 1998) |
| batrachotoxin | <protein> Neurotoxin from the Columbian poison frog Phyllobates. A steroidal alkaloid that affects sodium channels. Batrachotoxin R is more effective than related Batrachotoxin A. (18 Nov 1997) |
| batrachotoxins | Batrachotoxin is the 20-alpha-bromobenzoate of batrachotoxin a; they are toxins from the venom of a small colombian frog, phyllobates aurotaenia, cause release of acetylcholine, destruction of synaptic vesicles and depolarisation of nerve and muscle fibres. (12 Dec 1998) |
| batroxostatin | <protein> Peptides found in the venoms of various snakes of the viper family, that inhibit the function of some integrins of the _1 and _3 classes. They were first identified as inhibitors of platelet aggregation and were subsequently shown to bind with high affinity to integrins and to block the interaction of integrins with RGD containing proteins for example they block the binding of the platelet integrin _IIb_3 to fibrinogen. Disintegrins are effective inhibitors at molar concentrations 500-2000x lower than short RGDX peptides. They are cysteine rich peptides ranging from 45 to 84 amino acids in length and almost all of them have a conserved RGD sequence on a _ turn, presumed to be the site that binds to integrins. The assumption is that their biological role in the venom is to inhibit blood clotting. Found in many snake species, where they are called variously albolabrin, applagin, batroxostatin, bitistatin, echistatin, elegantin, flavouridin, halysin, kistrin, triflavin and trigramin. (18 Nov 1997) |
| batson venous plexus | <radiology> Paravertebral venous plexus, can carry tumour emboli directly to brain from pelvis or abdomen (12 Dec 1998) |
| Batson's plexus | Any of four interconnected venous networks surrounding the vertebral column; anterior external vertebral venous plexus, the small system around the vertebral bodies; posterior external vertebral venous plexus, the extensive system around the vertebral processes; anterior internal vertebral venous plexus, the system running the length of the vertebral canal anterior to the dura; posterior internal vertebral venous plexus, the system running the length of the vertebral canal posterior to the dura; the latter two constitute the epidural venous plexus. Synonym: plexus venosus vertebralis, Batson's plexus, vertebral venous plexus. (05 Mar 2000) |
| Batson, Oscar | <person> U.S. Otolaryngologist, 1894-1979. See: Batson's plexus, Carmody-Batson operation. (05 Mar 2000) |
| battel | Provisions ordered from the buttery; also, the charges for them; only in the pl, except when used adjectively. To be supplied with provisions from the buttery. Fertile; fruitful; productive. "A battel soil for grain, for pasture good." (Fairfax) Origin: Of uncertain etymology. Source: Websters Dictionary (01 Mar 1998) |
| batten | A strip of sawed stuff, or a scantling; as, A strip of wood used in fastening the edges of a tarpaulin to the deck, also around masts to prevent chafing. A long, thin strip used to strengthen a part, to cover a crack, etc. Batten door, a door made of boards of the whole length of the door, secured by battens nailed crosswise. Origin: F. Bton stick, staff. See Baton. Source: Websters Dictionary (01 Mar 1998) |
| batten disease | <disease> This congenital disorder strikes between the ages of 5 and 10, causing the afflicted child to suddenly go blind. The child begins to suffer fromseizures and mental deterioration, afflicted individuals typically diebefore the age of 20. The disease is caused by the accumulation of toxicproteins in nerve cells, the root of the disorder is a mutation of a geneon chromosome 16. (09 Oct 1997) |