nanometer=نانومتر

nanometer=نانومتر

ONLINE ETYMOLOGY DICTIONARY:

nanometer (n.)

also nanometre, 1963, from nano- + meter (n.2).

nano-

introduced 1947 (at 14th conference of the Union Internationale de Chimie) as a prefix for units of one thousand-millionth part, from Gk. nanos "a dwarf." According to Watkins, this is originally "little old man," from nannos "uncle," masc. of nanna "aunt" (see nana). Earlier it was used as a prefix to mean "dwarf, dwarfish," and still in a non-scientific sense of "very small."

meter (n.2)

also metre, unit of length, 1797, from Fr. mètre (18c.), from Gk. metron "measure," from PIE root *me- "to measure" (cf. Gk. metra "lot, portion," Skt. mati "measures," matra "measure," Avestan, O.Pers. ma-, L. metri "to measure"). Developed by French Academy of Sciences for system of weights and measures based on a decimal system originated 1670 by French clergyman Gabriel Mouton. Originally intended to be one ten-millionth of the length of a quadrant of the meridian.