| 释义 |
pyrenoid, a. and n.|paɪˈriːnɔɪd|
[f. Gr. πῡρήν (see pyrene1): see -oid.]
A. adj. Resembling in form the stone of a fruit: see quots. rare—0.
[1693tr. Blancard's Phys. Dict. (ed. 2), Pyrenoides processus, the Tooth of the second Vertebra.] 1858Mayne Expos. Lex., Pyrenoides,..pyrenoid. 1897Syd. Soc. Lex., Pyrenoid, kernel-shaped. Anat. Epithet formerly applied to the odontoid process of the axis vertebra.
B. n. A small colourless proteid body, resembling a nucleus, found in certain algæ and protozoa.
1883Science I. 148/2 Schmitz finds in the chromatophors of many algæ more or less spherical bodies to which he gives the name of pyrenoids. 1895Oliver tr. Kerner's Nat. Hist. Plants II. 629 The exact part played by the pyrenoid is very obscure, but there can be no doubt that it influences in some way the formation or deposition of starch by the protoplasm. 1901G. N. Calkins Protozoa 117 Chromatophores in which one or more deeply staining bodies—the pyrenoids—may be found. |