| allotriploid | See: alloploid. Origin: allo + triploid (05 Mar 2000) |
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| allotrope | <chemistry> Any individual structural form of an element which comes in at least two different structural types. (09 Oct 1997) |
| allotrophic | Having an altered nutritive value. Origin: allo-+ G. Trophe, nourishment (05 Mar 2000) |
| allotropic | 1. Relating to allotropism. 2. Denoting a type of personality characterised by a preoccupation with the reactions of others. (05 Mar 2000) |
| allotropic personality | See: allotropic. (05 Mar 2000) |
| allotropism | The existence of certain elements, in several forms differing in physical properties; e.g., carbon black, graphite, and diamond are all pure carbon. Origin: allo-+ G. Tropos, a turning (05 Mar 2000) |
| allotropize | To change in physical properties but not in substance. Source: Websters Dictionary (01 Mar 1998) |
| allotropy | <chemistry> The property of existing in two or more conditions which are distinct in their physical or chemical relations. Thus, carbon occurs crystallized in octahedrons and other related forms, in a state of extreme hardness, in the diamond; it occurs in hexagonal forms, and of little hardness, in black lead; and again occurs in a third form, with entire softness, in lampblack and charcoal. In some cases, one of these is peculiarly an active state, and the other a passive one. Thus, ozone is an active state of oxygen, and is distinct from ordinary oxygen, which is the element in its passive state. Origin: Gr. Other + direction, way, to turn: cf. F. Allotropie. Source: Websters Dictionary (01 Mar 1998) |
| allotype | <genetics> Products of one or more alleles that can be detected as inherited variants of a particular molecule. Usually the usage is restricted to those immunoglobulins that can be separately detected antigenically. In humans light chain allotypes are known as Km (Inv) allotypes and heavy chain allotypes as Gm allotypes. See: idiotype. (18 Nov 1997) |
| allotypic | Pertaining to an allotype. (05 Mar 2000) |
| allotypic determinants | Antigenic determinant's of allotypes. (05 Mar 2000) |
| allotypic marker | Synonym: allotype. (05 Mar 2000) |
| allowance | 1. Approval; approbation. 2. The act of allowing, granting, conceding, or admitting; authorisation; permission; sanction; tolerance. "Without the king's will or the state's allowance." (Shak) 3. Acknowledgment. "The censure of the which one must in your allowance o'erweigh a whole theater of others." (Shak) 4. License; indulgence. 5. That which is allowed; a share or portion allotted or granted; a sum granted as a reimbursement, a bounty, or as appropriate for any purpose; a stated quantity, as of food or drink; hence, a limited quantity of meat and drink, when provisions fall short. "I can give the boy a handsome allowance." (Thackeray) 6. Abatement; deduction; the taking into account of mitigating circumstances; as, to make allowance for the inexperience of youth. "After making the largest allowance for fraud." (Macaulay) 7. A customary deduction from the gross weight of goods, different in different countries, such as tare and tret. Origin: OF. Alouance. To put upon a fixed allowance (especially. Of provisions and drink); to supply in a fixed and limited quantity; as, the captain was obliged to allowance his crew; our provisions were allowanced. Origin: See Allowance. Source: Websters Dictionary (01 Mar 1998) |
| alloxan | <chemical> Used to produce diabetes mellitus in experimental animals. Destroys beta cells in the pancreas by a mechanism involving superoxide production. (15 Nov 1997) |
| alloxan diabetes | Experimental diabetes mellitus produced in animals by the administration of alloxan, which damages the insulin-producing islet cells of the pancreas. (05 Mar 2000) |