aphotic

形容词 adj.
中文释义
英 /eɪˈfəʊtɪk/    美 /eɪˈfoʊtɪk/

英文释义

形容词 adj.
  1. Having no light, especially no sunlight.
  2. Describing that part of deep lakes and oceans where less than one per cent of sunlight penetrates and where photosynthesis is not possible.
    — As experiment has shown that light waves capable of effecting chemical changes do not penetrate the water deeper than 400 meters and as the other conditions of assimilation are met above this line, it is proposed to distinguish a diaphanic region including the land and the water to a depth of 400 m. and inhabited by assimilating organisms and an aphotic region including the ocean and lakes below the assimilation-line and the dark caves of the crust, where plant life is impossible.

词形变化

more aphotic comparative most aphotic superlative

词汇关系

下位词
mesopelagic twilight bathypelagic bathyal midnight abyssopelagic abyssal hadopelagic hadalpelagic hadal
衍生词
aphotic zone
并列词
disphotic euphotic

词源

From a- (prefix meaning ‘not; without; opposite of’) + photic.
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