Noah Webster
Tripyramid
TRIPYR'AMID, noun [Latin tres and pyramis.] In mineralogy, a genus of spars, the body of which is composed of single pyramids, each of three sides, affixed by their base to some solid body.
TRIPYR'AMID, noun [Latin tres and pyramis.] In mineralogy, a genus of spars, the body of which is composed of single pyramids, each of three sides, affixed by their base to some solid body.