noun
haltere; balancer
Technical term in entomology for the small knob-like balancing organ found in flies (Diptera).
ハエの平均棍は、飛行中のバランスをとる役割を果たす。
The halteres of a fly serve to maintain balance during flight.
Compound of 平均 (へいきん, 'balance, equilibrium') and 棍 (こん, 'club, stick'), referring to the club-shaped balancing organ.