a large insect with transparent wings, common in hot countries. The male makes a continuous high sound after dark by making two membranes (= pieces of thin skin) on its body vibrate (= move very fast). 蝉；知了 Cicadas buzzed in the heat of the day. 蝉在一天的热闹中嗡嗡作响。
Word Originlate Middle English: from Latin cicada, cicala.