| Budge's centre | The preganglionic motor neurons in the first thoracic segment of the spinal cord which give rise to the sympathetic innervation of the dilator muscle of the eye's pupil. Synonym: Budge's centre. (05 Mar 2000) |
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| Budge, Julius | <person> German physiologist, 1811-1888. See: Budge's centre. (05 Mar 2000) |
| budgerigar | An Australian parakeet (Melopsillacus undulatus) commonly kept as a small pet bird. (05 Mar 2000) |
| budgets | Detailed financial plans for carrying out specific activities for a certain period of time. They include proposed income and expenditures. (12 Dec 1998) |
| budgie | Abbreviated form of budgerigar. (05 Mar 2000) |
| Budin's obstetrical joint | Cartilaginous union between the squamous and lateral parts of the occipital bone in the newborn. Synonym: synchondrosis intraoccipitalis posterior, Budin's obstetrical joint, posterior intraoccipital joint. (05 Mar 2000) |
| Budin, Pierre | <person> French gynecologist, 1846-1907. See: Budin's obstetrical joint. (05 Mar 2000) |
| BUdR | <chemical, molecular biology> Analogue of thymidine that induces point mutations because of its tendency to tautomerisation: in the enol form it pairs with G instead of A. It is used as a mutagen and also as a marker for DNA synthesis (the incorporation of BUdR can be recognised because the staining pattern differs: an even more sensitive method uses a monoclonal antibody staining procedure.) (12 May 1997) |
| Buerger's disease | <cardiology> A progressive occlusive disease of the arteries and veins. The cause of Buerger's disease is unknown. Smoking appears to accelerate the occlusive effects of Buerger's. (27 Sep 1997) |
| Buerger, Leo | <person> Austrian-U.S. Physician, 1879-1943. See: Winiwarter-Buerger disease, Buerger's disease. (05 Mar 2000) |
| bufa- | Combining forms denoting origin from toads; used in the systematic and trivial names of toxic substances (genins) isolated from plants and animals containing the bufanolide structure; prefixes denoting species origin are often attached. Origin: L. Bufo, toad (05 Mar 2000) |
| bufadienolide | See: bufanolide. (05 Mar 2000) |
| bufadienolides (two double bonds) | Bufatrienolides (three double bonds), etc; they have varying numbers of hydroxyl groups at positions 3, 5, 14, and 16, and these may be further substituted. For structure, see steroids. (05 Mar 2000) |
| bufagenins | A group of steroids (bufanolides) in the venom of a family of toads (Bufonidae) having a digitalis-like action upon the heart; cardiac glycosides having a six-membered lactone. See: bufotoxins. Synonym: bufagenins, bufogenins. (05 Mar 2000) |
| bufagins | A group of steroids (bufanolides) in the venom of a family of toads (Bufonidae) having a digitalis-like action upon the heart; cardiac glycosides having a six-membered lactone. See: bufotoxins. Synonym: bufagenins, bufogenins. (05 Mar 2000) |