| Altmann's theory | A theory that protoplasm consists of granular particles (called bioblasts) that are clustered and enclosed in indifferent matter. (05 Mar 2000) |
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| Altmann, Richard | <person> German histologist, 1852-1900. See: Altmann's fixative, Altmann's granule, Altmann's anilin-acid fuchsin stain, Altmann's theory, Altmann-Gersh method. (05 Mar 2000) |
| Altmann-Gersh method | The method of rapidly freezing a tissue and dehydrating it in a vacuum. (05 Mar 2000) |
| alto | Origin: It. Alto high, fr. L. Altus. Cf. Alt. 1. Formerly the part sung by the highest male, or counter-tenor, voices; now the part sung by the lowest female, or contralto, voices, between in tenor and soprano. In instrumental music it now signifies the tenor. 2. An alto singer. Alto clef the counter-tenor clef, or the C clef, placed so that the two strokes include the middle line of the staff. Source: Websters Dictionary (01 Mar 1998) |
| altretamine | <chemical> N,n,n',n',n'',n''-hexamethyl-1,3,5-triazine-2,4,6-triamine. An alkylating agent proposed as an antineoplastic. It also acts as a chemosterilant for male houseflies and other insects. Pharmacological action: alkylating agents, antineoplastic agent, alkylating, chemosterilants. Chemical name: 1,3,5-Triazine-2,4,6-triamine, N,N,N',N',N'',N''-hexamethyl- (12 Dec 1998) |
| altrical | <zoology> Like the articles. Source: Websters Dictionary (01 Mar 1998) |
| altrices | <zoology> Nursers, a term applied to those birds whose young are hatched in a very immature and helpless condition, so as to require the care of their parents for some time; opposed to praecoces. Origin: L, nourishes, pl. Of altrix. Source: Websters Dictionary (01 Mar 1998) |
| altrigendrism | Natural, wholesome, nonerotic activity between the sexes. Origin: L. Alter, the other, + gender (05 Mar 2000) |
| altrose | An aldohexose isomeric with glucose, tallose, allose, etc. D-Altrose is epimeric with d-mannose. (05 Mar 2000) |
| altruism | Regard for others, both natural and moral; devotion to the interests of others; brotherly kindness; opposed to egoism or selfishness. Origin: F. Altruisme (a word of Comte's), It. Altrui of or to others, fr. L. Alter another. Source: Websters Dictionary (01 Mar 1998) |
| altruistic | Regardful of others; beneficent; unselfish; opposed to egoistic or selfish. Altruis"tically. Origin: Cf. F. Altruiste, a. See Altruism. Source: Websters Dictionary (01 Mar 1998) |