Belonging to or characteristic of the acarine group Gamasida (in early use restricted to the former family Gamasidae), comprising mites that are typically free-living and predatory, and some that are parasitic or commensal.
Economically important gamasid mites include the phytoseiid mites, which are used in the biological control of insect pests, and the bee mite, Varroa destructor.
A gamasid mite.
Late 19th century. From scientific Latin Gamasus, genus name (Latreille, 1802), specific use of post-classical Latin gamasus agile + -id, after scientific Latin Gamasidae, former family name, or (in later use) Gamasida, group name.