pinniped
plural of placebo
Any of various large marine mammals belonging to the superfamily (formerly considered a suborder) Pinnipedia comprising walruses, eared seals and earless seals.
(geology) the movement downslope of soil and rock in response to gravity
(mineralogy) A plagioclase feldspar, the fifth member of the Albite-Anorthite solid solution series. Bytownite is rare, and normally occurs in small grains in lime-rich igneous rocks. Clear pale ye...
その鰭脚類は餌をとる合間に岩場の浜に這い上がって休んだ。
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