man orchids
(geology) Of a geologic era within the Archaean eon from about 3200 to 2800 million years ago; stromatolites have existed from this time.
plural of man orchid
(chemistry) An ensemble of chemically identical molecular entities that can explore the same set of molecular energy levels on the time scale of the experiment.
plural of fumatorium
ハイキング中、草むらに隠れている小さな人の形をしたランの群れを見つけて感激した。
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