plural of iva
n any of various coarse shrubby plants of the genus Iva with small greenish flowers; common in moist areas (as coastal salt marshes) of eastern and central North America
(iva 的复数) Ideal Voltage Amplifier理想电压放大器；Inspection Visual Aid 检查用观察用具；Intra-Vehicular Activity （航天飞机）舱内活动