柱

column shape; cylinder; columnar

spinal column

pillared corridor

かくちゅう only

prism

polygonal (esp. square) pillar

かくばしら only

bamboo

pillar; cornerstone

Architecture

colonnade; row of columns

shape of a pillar or column

beryl

mosquito swarm

hexagonal prism

quadrangular prism

central pillar

principal post; backbone of a society or community

adductor muscle (of a bivalve)

Architecture

capital (of a column)

Biology

stigma; top part of the pistil in a flower

pillars supporting heaven

triangular prism

Sumo

four posts that used to support the roof over the ring

(flower's) style

marker; signpost; guide pole

levelling pole (surveying)

cross (used in a crucifixion)

main pillar

spliced pole (building, electrical)

bridge of a koto

person upon whom one relies