1. A family of ticks (order Acarina, suborder Ixodidea), the so-called hard ticks, characterized by rigid body form, presence of a dorsal shield, and an anteriorly projecting capitulum. It includes the genera Ixodes, Hyalomma, Amblyomma, Boophilus, Margaropus, Dermacentor, Haemaphysalis, and Rhipicephalus, species of which transmit many important human and animal diseases and cause tick paralysis; they occasionally attack humans, a few habitually so.
Stedman’s Medical Dictionary © Wolters Kluwer Health. All rights reserved.