sand dollar
(astronautics) Initialism of vertical takeoff and horizontal landing.
Alternative spelling of kamancheh
Any echinoderm of the order Clypeasteroida, having a flat, disk-shaped body with the mouth in a mid-ventral position, and living in sand, on or near the surface.
A sound that rasps. / The act of rasping as with a file.
潮間帯を歩いていると、砂の上やその近くに生息する平らで円盤状の棘皮動物の乾いた骨格を見つけ、その表面には繊細な花のような模様がありました。
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