stonefly Syllabification: (stone·fly)Pronunciation: /ˈstōnˌflī/Definition of stonefly noun (plural stoneflies) a slender insect with transparent membranous wings, the larvae of which live in clean running water. The adults are used as bait by fly fishermen. Order Plecoptera: many families stonefly in other Oxford dictionaries Definition of stonefly in the British & World English dictionary
