equiconcave

形容词 adj.

英文释义

形容词 adj.
  1. Having surfaces with the same concave radius of curvature.
    — In an equiconcave lens the foci are virtual and are crossed over; thus, the lens in fig. 25A is equiconcave, the focus F, instead of being measured from A to the right hand, must be measured to the left hand; consequently, § of the thickness must be subtracted from the focal length in order to determine the distance of F from the surface of the lens.

词形变化

more equiconcave comparative most equiconcave superlative

词源

From equi- + concave.
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