metatherian (metatherian)

and n. I. a. Pertaining to the Meta the ria, or having their characters: as, a metatherian mammal; the metatherian type. II. n. A member of the Meta the ria . metathesis (me-tath'e-sis), n. [LL., μετά θεσις , transposition, metathesis, μετατίθεναι , put over, transpose, μετά , over, + τιθέναι , put: see thesis.] 1. In gram ., transposition, more especially of the letters, sounds, or syllables of a word, as in the case of Anglo-Saxon acsian , ās cian , English ax , ask ; Anglo-Saxon brid , Eng lish bird. IMG:content-0543.png:[blocks in formation] IMG:content-0544.png:[blocks in formation] a, articular facet for inner condyle of tibia; 6, articular facet for outer condyle of tibia; c, c, two foramina, showing incomplete fusion of three metatarsals; d, point of attachment of acce ory metatarsal; 2, 3, 4. articular facets for second, third, and fourth toes. hock and the fetlock, and has but one functional bone. In birds it is the part popularly called the shank, and in descriptive ornithology known as the tarsus. In most birds the metatarsus is naked and scaly, and extends from the bases of the toes to the suffrago or first above. being one representing three metatarsals fused together, and further complicated by the fusion of distal tarsal elements with its proximal end. In birds with four toes the metatarsus includes a separate bone known as the acce ory metatarsal, which is the metatarsal bone of the hallux or hind toe, the metatarsus hallucis. 2. In entom.: ( a ) The first one of the joints of the tarsus, when it is large or otherwise distinguished from the rest, which are then called collectively the dactylus. Also called planta, in which case the other joints are collectively known as the or planta of bees is known as the scopula. (b) With digit us. The peculiarly expanded bristly metatarsus some authors, the hind foot; the entire tarsus of each hind leg; each of the third pair tarsi. When this nomenclature is used, the tarsus of the middle leg is called me star strand that of the foreleg pro tarsus. (c) The sixth joint of a spider's leg, being the first of the two which form the foot. - Flexor metatarsi. Same as peroneus tertius (which see, under peroneus). metathoracotheca (met-a-thora-kō-the'kä), n.; pl. metathoracothecæ (-sē). [NL., thorax + θήκη, a case.] In entom., the metathoracic case, or that part of the integument of a pupa covering the metathorax. It is generally indistinguishable in the Lepidoptera and Dip tera. metathorax (met-a