Stanchion
Stanchion (stan"shun; 277) , noun
[Old French estanson, estancon, French étancon, from Old French estance a stay, a prop, from Latin stans, stantis, standing, present participle of stare to stand. See Stand, and compare Stanza.]
1.
(Architecture) A prop or support; a piece of timber in the form of a stake or post, used for a support or stay.
2.
(Nautical) Any upright post or beam used as a support, as for the deck, the quarter rails, awnings, etc.
3.
A vertical bar for confining cattle in a stall.