- nanometer, nanometre, nm, millimicron, micromillimeter, micromillimetre - a metric unit of length equal to one billionth of a meter
--1 is a kind of metric linear unit
--1 is a part of micron, micrometer
--1 has parts: angstrom, angstrom unit, A - New Mexico, Land of Enchantment, NM - a state in southwestern United States on the Mexican border
--2 is a kind of American state
--2 is a part of
--2 has parts:United States, United States of America, America, US, U.S., USA, U.S.A.