The Collaborative International Dictionary of English v.0.48:
Microfarad \Mi`cro*far"ad\, n. [Micro- + farad.] (Elec.) The millionth part of a farad. [1913 Webster]WordNet (r) 3.0 (2006):
microfarad n 1: a unit of capacitance equal to one millionth of a farad