9 Grammatical Pitfalls
1550s (earlier in Latin form piramis, late 14c.), from French pyramide (Old French piramide "obelisk, stela," 12c.), from Latin pyramides, plural of pyramis "one of the pyramids of Egypt," from Greek pyramis (plural pyramides) "a pyramid," apparently an alteration of Egyptian pimar "pyramid." Financial sense is from 1911. Related: Pyramidal.
pyramid pyr·a·mid (pĭr'ə-mĭd)
A solid figure with a polygonal base and triangular faces that meet at a common point.
A structure or part shaped like a pyramid.
A group of huge monuments in the desert of Egypt, built as burial vaults for ancient Egyptian kings. The age of pyramid building in Egypt began about 2700 b.c. (See under “World History to 1550.”)
A group of huge monuments in the Egyptian desert, built as burial vaults for the pharaohs and one of the Seven Wonders of the Ancient World. The pyramids have square bases and four triangular faces. Pyramid building began in Egypt about 2700 b.c. and required vast amounts of slave labor.
Shoes with extremely thick soles and heels
[1970s+; in the sense ''very thick soles,'' found by 1945]