ivory point

ivory point

[′īv·rē ¦pȯint]
(engineering)
A small pointer extending downward from the top of the cistern of a Fortin barometer; the level of the mercury in the cistern is adjusted so that it just comes in contact with the end of the pointer, thus setting the zero of the barometer scale.
References in periodicals archive ?
The bride, given in marriage by her father, wore a sleeveless designer gown of ivory point d'esprit lace and beaded Venice lace.
The set featured an ivory point d'Alencon over silk charmeuse bodice fashioned into an open back.
A nice 4x4 buck with ivory points stepped out of the trees and into the plowed field, 27 yards from his stand.