| 释义 |
▪ I. dy|daɪ|
[a. Sw. dy mire, ooze (H. von Post 1862, in K. Sven. Vetenskaps-Akad. Handl. 1), f. ON. dý, perh. f. Gmc. *dunhia, rel. to *dungia, the antecedent of OE. dung dung (see Falk and Torp); but the etym. of the ON. word is disputed.]
A type of sediment rich in organic matter deposited in unproductive lakes.
1936S. A. Waksman Humus iv. 66 Formation of ‘dy’, or colloidal humus material, in environments supplying amounts of air that are limited as a result of water cover. 1939W. H. Twenhofel Princ. Sedimentation ii. 88 Black muds..have been differentiated into gyttja..and dy if the organic matter was brought to the lakes in colloidal form. 1957G. E. Hutchinson Treat. Limnol. I. xvii. 882 The distinction between autochthonous (gyttja) and allochthonous (dy) organic sediments was early made by the Swedish students of sedimentation.
▪ II. dy
obs. form of die.
▪ III. dy, dyah
see daye. |