| 释义 |
crenulate, a.|ˈkrɛnjuːlət|
[ad. mod.L. crēnulātus, f. crēnula, dim. of crēna (see crena) + -ate1. In mod.F. crénulé.]
1. Zool. and Bot. Having the edge divided into minute rounded teeth; finely notched or scalloped: said of a leaf, a shell, etc.
1794Martyn Rousseau's Bot. xxvii. 414 The second has the lip of the nectary crenulate. 1846Dana Zooph. (1848) 136 Margin of base crenulate. 1872Oliver Elem. Bot. App. 309 Lower petal..3-lobed..lateral lobes usually..crenulate.
2. Geogr. Of a shoreline: having many small irregular bays formed by the action of waves on softer rock.
1919D. W. Johnson Shore Processes vi. 278 Early in the youth of the shoreline the curves will be changed to sharply and irregularly crenulate lines by differential wave erosion... We may call a shoreline of this character a crenulate shoreline. 1937Wooldridge & Morgan Physical Basis Geogr. xxi. 349 All variations in rock hardness, and divisional planes, are picked out by the waves, and the line of the exposed portions of the shore becomes complex or crenulate. 1967D. G. Fry tr. Zenkovich's Processes Coastal Devel. viii. 492 A crenulate coastline often develops in igneous rocks, where there is alternation of veins and dykes of different compositions, and of zones of jointing. |