0 Old HSK word(s):
凹透镜* *

Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.

凹 concave, hollow, depressed / a pass, valley
透 penetrate, pass through
镜 mirror / lens / glass / glasses

Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual




Bikonkavlinse (S) [shuang1 ao1 tou4 jing4] 双凹透镜