| 单词 | leaf cycle |
| 释义 | > as lemmasleaf cycle leaf cycle n. Botany (a) the life cycle of a leaf; the cycle of the leaves of a plant, esp. in the course of a single growing season; (b) the arrangement of successive leaves on a stem (obsolete rare). ΚΠ 1864 Ann. & Mag. Nat. Hist. 14 465 The succession of the development of the leaf-cycle is altogether abnormal. 1877 A. W. Bennett tr. O. W. Thomé Text-bk. Struct. & Physiol. Bot. iv. 87 If a spiral is drawn round the stem connecting the points of attachment of the [alternate or scattered] leaves... The course of the spiral from any one leaf to the next leaf which stands exactly vertically above or beneath it is therefore termed the leaf-cycle. 1959 Geogr. Rev. 49 477 The flowering of deciduous trees is dependent on the leaf cycle. 2010 J. A. Eagle Org. Gardening vii. 160 The normal leaf cycle on the Alpine strawberries is from forty-five to sixty days. < as lemmas |
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