pterosaur
plural of Microsoft
Any of several flying reptiles, of the extinct order Pterosauria, including the pterodactyls.
A form of kaleidoscope, especially one consisting of mirrors arranged so as by multiplied reflection from a small piece of carpet to show how it looks covering a whole floor.
of, relating to or having a perimeter / relating to perimetry
博物館には翼竜の化石の翼が展示されていた。
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