御中[onaka] stomach
御話中[ohanashichuu] busy (phone)
アル中[aruchuu] alcoholism
π中間子[paichuukanshi] pi meson
暗中[anchuu] in the dark

暗中摸索[anchuumosaku] groping in the dark
意中[ichuu] one's mind
意中の女[ichuunoonna] sweetheart
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一日中[ichinichijuu] all day long

胃嚢[ibukuro] stomach
陰嚢[innou] scrotum
精嚢[seinou] seminal vesicle
胆嚢[tannou] gall bladder
中衣嚢[nakagakushi] inside pocket

土嚢[donou] sandbag
氷嚢[hyounou] ice bag
卵黄嚢[ranounou] yolk sac
卵嚢[rannou] egg sac

円錐[ensui] cone
円錐[marugiri] round gimlet
円錐曲線[ensuikyokusen] conic curve
円錐形[ensuikei] cone
円錐体[ensuitai] cone

角錐[kakusui] pyramid
三角錐[sankakusui] triangular pyramid
円錐台[ensuidai] circular truncated cone
立錐[rissui] setting a drill bit