The Collaborative International Dictionary of English v.0.48:
Ohmmeter \Ohm"me`ter\, n. [Ohm + meter.] (Elec.) An instrument for indicating directly the electrical resistance of a circuit in ohms. [Webster 1913 Suppl.]WordNet (r) 3.0 (2006):
ohmmeter n 1: a meter for measuring electrical resistance in ohms