pyramid (n.)youdaoicibaDictYouDict[pyramid 词源字典]
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 etymology, pyramid origin, 英语词源]
aminoyoudaoicibaDictYouDict
"The group —NH2, present in amino acids, amides, and many amines", Late 19th century: from amine.