n.either of the rudimentary hind wings of dipterous insects; used for maintaining equilibrium during flight
同义词：halterbalancer
英汉双解大词典
haltere/ˈhæltə/(alsohalter)
1.
N（名词）
one of a pair of short projections in dipterous insects that are modified hind wings, used for maintaining equilibrium during flight 双翅昆虫修饰型后翼内的短隆起物; 用以在飞行中保持平衡 (Also called balancer)