trochal disk
A southwest-northeast sea strait in the Falkland Islands, separating East and West Falkland.
The cephalic disk of a rotifer, usually surrounded by a fringe of cilia.
Not of or pertaining to technology.
plural of medicine ball
顕微鏡で観察すると、輪形動物の環毛円盤が規則的に動き、微小な餌粒子を引き寄せる水流を生み出していた。
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