单词	iris diaphragm
释义	iris diaphragm noun : an adjustable diaphragm of thin opaque plates that can be turned by a ring so as to change the diameter of a central opening usually to regulate the aperture of a lens Word History First Known Use 1867, in the meaning defined above Medical Definition iris diaphragm noun : an adjustable diaphragm of thin opaque plates that can be turned by a ring so as to change the diameter of a central opening usually to regulate the aperture of a lens (as in a microscope)
随便看	squamula squamulae squamulas squamulate squamulation squamule squamules squamuliform squamulose squander squandered squanderer squanderers squandering squanderings squandermania squandermaniae squandermanias squanders squanter-squash squantum squarable square square (off) square alphabet

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