弁蓋部 べんがいぶ Meanings Noun pars opercularis; orbital part of inferior frontal gyrus See also: 下前頭回 (かぜんとうかい). Kanji 弁 speech. Read as ベン. 蓋 lid. Read as ガイ. 部 part. Read as ブ. Jinuma: Japanese Dictionary · Word lists