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单词 aplanatic
释义

WordReference Random House Unabridged Dictionary of American English © 2024
ap•la•nat•ic  (ap′lə natik),USA pronunciation adj. [Optics.]
  1. Opticsfree from spherical aberration and coma.
  • a-6 + Greek planá(ein) to wander + -tic. See planet 1785–95
ap′la•nati•cal•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::
aplanatic /ˌæpləˈnætɪk/ adj
  1. (of a lens or mirror) free from spherical aberration
Etymology: 18th Century: from Greek aplanētos prevented from wandering, from a-1 + planētos, from planaein to wander
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