| 释义 |
heterogenesis Biol.|ˌhɛtərəʊˈdʒɛnɪsɪs|
[f. Gr. ἑτερο- hetero- + γένεσις birth, generation.]
†1. Abnormal or irregular organic development: see quot. Obs. (So F. hétérogénésie.)
1854Mayne Expos. Lex., Heterogenesis, name given by Breschet to a Class of organic deviations comprehending those in which there exists a relative anomaly, whether from the situation or from the colour of organs, the number or the situation of the fetuses belonging to the same gestation, the situation or the number of organs in particular.
†2. Applied to sexual reproduction from two different germs, male and female. Obs.
1858Carpenter Veg. Phys. §398 The process by which new individuals are produced is called Heterogenesis. In this process, two different cells are concerned..germ-cells and sperm-cells.
3. The birth or origination of a living being otherwise than from a parent of the same kind.
1864Q. Jrnl. Sc. Jan. 17 Heterogenesis is a term employed to express the creation or birth of living beings in an abnormal manner. Ibid., At present the evidence which we possess..is rather adverse to the doctrine of ‘heterogenesis’ in any form. 1870Huxley in Brit. Assoc. Rep. p. lxxvii, The living parent was supposed to give rise to offspring which passed through a totally different series of states from those exhibited by the parent, and did not return into the cycle of the parent; this is what ought to be called Heterogenesis, the offspring being altogether, and permanently, unlike the parent.
b. esp. The generation of animals or vegetables of low organization from inorganic matter; abiogenesis; spontaneous generation.
1878Tyndall in 19th Cent. III. 23 The notion of heterogenesis or spontaneous generation.
c. Alternation of generations.
1863H. Spencer Biol. I. ii. vii. 211 Where propagation is carried on by heterogenesis, or is characterized by unlikeness of the successive generations, there is always asexual genesis with occasionally-recurring sexual genesis. 1875tr. Schmidt's Desc. & Darw. 169 When the species is composed of a regular alternation of variously constituted generations and individuals. This particular sort of reversion is termed Alternate Generation, or Heterogenesis. |