| 释义 |
grex Biol.|grɛks|
[a. L. grex flock.]
A clump of myxamœbæ formed during a phase of the life cycle of cellular slime moulds, the Acrasina or Acrasiomycetes. Also attrib.
1962B. M. Shaffer in M. Abercrombie Adv. Morphogenesis II. 112 In the second phase, the aggregate has a fairly definite shape, whatever its origin, and reactions that are foreign to those of the component cells: it has become the individual. As no existing words connoting ‘many-in-oneness’ seem to be available, the name grex—the classical product of ad-gregation—is put forward for it. Ibid. 162 If the grex cells move like stream cells, we must again consider to what extent they are guided by acrasin. 1971Nature 4 June 329/2 Although the aggregate can differentiate directly into a fruiting body it usually migrates as a coordinated irritable whole in the form of a tapered cylinder called the grex. |