Any of numerous small bloodsucking parasitic arachnids of the family Ixodidae, many of which transmit febrile diseases, such as Rocky Mountain spotted fever and Lyme disease.

• 虱类蜱总科的多种小型吸血寄生蛛形动物，其中许多可以传播洛矶山脉斑疹热和莱姆氏病等热病