| 单词 | abaxial |
| 释义 | abaxial, a. Bot.|æbˈæksɪəl|
[mod. f. L. ab away from + axi-s axle + -al1; less analogically formed than the following.]
a. = abaxile.
1857Henfrey Elem. Botany 303 It [the embryo] may be abaxial or excentric, when the layer of endosperm is thickest on one side.
b. Of, pertaining to, or designating the surface (usu. the underside) of a leaf, etc., which during development initially faces away from the main axis or stem; opp. adaxial a. Cf. dorsal a. 2 b.
1900B. D. Jackson Gloss. Bot. Terms 1/2 Abaxial,..the side of a lateral organ away from the axis. 1914M. Drummond tr. Haberlandt's Physiol. Plant Anat. vi. 289 The presence of the last-mentioned layer [in the leaf] illustrates a tendency on the part of the plant to extend the photosynthetic system beyond its ordinary limits, wherever illumination provides an opportunity. Such an abaxial palisade-layer..constitutes, as it were, a miniature copy of the principal adaxial system. 1960W. B. Crow Synopsis of Biol. xxi. 152 The leaf is..often clearly differentiated into an adaxial or ventral surface turned towards the stem, and an abaxial or dorsal surface away from it. 1979Nature 22 Nov. 425/2 Abaxial and adaxial patterns of stomatal response to light. |
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