おう
凹
めん
面

noun

  1. concavity.

takes genitive case の

  1. concave.

Variations

Pronunciation Kanji Kana Is Common
おう
凹
めん
面
 凹面 おうめん

Contained Kanji Breakdown

concave, hollow, sunken
へこ.む　オウ　ぼこ (9th, N1)
open box enclosure, open box radical (no. 17)
カン (Kentei 1)
mask, face, features
メン　おも　つら (3rd, N3)