peta-
combining form /petə/
/petə/
(specialist)- (in nouns; used in units of measurement
) 1015; one thousand million million构成名词,用于计量单位 拍(它),千万亿(即 1015) 词源from pe(n)ta-, from Greek pente ‘five’ (see penta-); based on the supposed analogy of tera- and tetra-.