| 单词 | pollen diagram |
| 释义 | > as lemmaspollen diagram pollen diagram n. a standardized graphical representation of pollen spectra from one site, showing changes in the frequencies of various kinds of pollen with depth (and hence with time). ΘΚΠ the world > plants > botany > [noun] > pollen analysis > diagrams or statistics pollen diagram1924 pollen spectrum1924 pollen profile1935 pollen graph1936 1924 G. Erdtman in Jrnl. Linn. Soc.: Bot. 46 453 By means of the percentage numbers a pollen-diagram is constructed. 1992 M. Atherden Upland Brit. ix. 158 Gaps began to appear in the woodland cover, recorded on the pollen diagrams as small temporary expansions of grasses and weeds. < as lemmas |
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