מַקְצוֹעַ maqtsôwaʻ (H4740)

an angle or recess

1) place of corner structure, corner buttress, inner corner-buttress 1a) corner post, buttress-place, buttress

or מַקְצֹעַ; or (feminine) מַקְצֹעָה; from קָצַע (H7106) in the denominative sense of bending;