noun, takes genitive case の

  1. convex surface, convex.

Variations

Pronunciation Kanji Kana Is Common
凸面 とつめん

Contained Kanji Breakdown

convex, beetle brow, uneven
トツ でこ (Early High School, N1)
open box enclosure, open box radical (no. 17)
カン (Kentei 1)
mask, face, features
メン おも つら (3rd, N3)
cliff, (厂 variant)
to turn around, to return, to go back
box, box or enclosure radical (no. 31)
イ コク (Kentei 1)
eye, class, look
め モク ボク (1st, N4)