Metatarsus: applied to basal joint of tarsus, where that differs greatly in length or otherwise from the other joints: see sarothrum.
Metatergum: = metanotum; q.v.
Metathoracotheca: the pupal covering of the meta-thorax.
Metathorax: the third thoracic ring or segment; bears the hind legs and second pair of wings; variably distinct; sometimes closely united with the mesothorax and sometimes appearing as a portion of the abdomen.
Metatype: is a specimen named by the author after comparison with the type; according to some, it should be also a topotype.
Metazona: in Orthoptera, the dorsal surface of the prothorax behind the principal sulcus.
Metepimeron: in Odonata, lies behind the second lateral suture and extends ventrally to the sternum.
Metepisternum: in Odonata, is the sclerite between the first and second lateral thoracic sutures.
Meter: the standard of length in the metric system = 39.37 inches: see centimeter and millimeter.
Meticulose -us: is a maculation in the form of a series of colored flames.