n.small wingless insect with a long bristlelike tail
英汉双解大词典
bristletail/ˈbrɪsəlˌteɪl/
1.
N（名词）
any primitive wingless insect of the orders Thysanura and Diplura, such as the silverfish and firebrat, having a flattened body and long tail appendages 缨尾虫