Search Result for "machmeter": 
Wordnet 3.0

NOUN (1)

1. speedometer for measuring the speed of an aircraft relative to the speed of sound; 



The Collaborative International Dictionary of English v.0.48:

machmeter \machmeter\ n.
   an instrument for measuring the speed of an aircraft relative
   to the speed of sound.
   [WordNet 1.5]


WordNet (r) 3.0 (2006):

machmeter
    n 1: speedometer for measuring the speed of an aircraft relative
         to the speed of sound