Definition of 回転計 (かいてんけい)
かいてんけい
                        回転計
かいてんけい
kaitenkei
noun
•
        
tachometer, revolution counter
Related Kanji
| 回 | -times, round, game, revolve, counter for occurrences | 
| 転 | revolve, turn around, change | 
| 計 | plot, plan, scheme, measure |