| 释义 |
gemmation|dʒɛˈmeɪʃən|
[a. F. gemmation, n. of action f. L. gemmāre: see prec.]
1. Bot.
a. The action of budding.
b. The manner in which the young leaf is enfolded in the bud.
c. The time when leaf-buds are put forth.
d. The arrangement of buds on the stalk.
1760Lee Introd. Bot. iii. xv. 200 Gemmation is the Construction of the gem or Bud. 1794Martyn Rousseau's Bot. xxxi. 485 The gemmation, or various construction of the buds. 1880Gray Struct. Bot. 413/1 Gemmation, budding-growth; or the disposition of buds.
2. Zool. The process of reproduction by gemmæ or buds; the formation of a new individual by the protrusion and complete or partial separation of a part of the parent; budding.
1836–9Todd Cycl. Anat. II. 142/1 The male has the appearance of a branch..sent off by gemmation. 1868E. P. Wright Ocean World iv. 84 In the next group the gemmation takes a spiral bias, producing the nautilus shape. 1883Chamb. Jrnl. 142 The natural process of reproduction in the sponge is effected by gemmation or budding off. |