| 释义 |
dysmerism Biol.|ˈdɪsmərɪz(ə)m|
[f. Gr. δυσ- (dys-) + µερισµός division into parts (merism).]
The aggregation of unlike or irregularly arranged parts in the formation of an organism. So dysmeˈristic a., having the character of such an aggregation. dysmerogenesis |ˌdɪsmərəʊˈdʒɛnɪsɪs| [Gr. µέρος part, γένεσις production], the formation of an organism by successive production of parts which are unlike or irregularly arranged; hence ˌdysmerogeˈnetic a., marked by or resulting from dysmerogenesis. ˈdysmeroˌmorph |-mɔːf| [Gr. µορϕή form], an organic form or organism resulting from dysmerogenesis; hence ˌdysmeroˈmorphic a., having the character of a dysmeromorph. (Opposed to eumerism, eumeristic, etc.)
1881E. R. Lankester in Encycl. Brit. XII. 555/1 (Hydrozoa) According to this second hypothesis..the tendency to bud-formation has all along acted concurrently with a powerful synthetic tendency, so that new units have from the first made but a gradual and disguised appearance. This is ‘dysmerogenesis’, and such aggregates as exhibit it may be called dysmeristic. Ibid. 555/2 Ordinary cell-division is an example of eumerogenesis; free-formation of nuclei, as in the fertilized ovum of Arthropoda, is dysmerogenesis. A synyctium is usually a synthesized eumeromorph, but may be a dysmeromorph. |