Meso- (in composition). Middle; median.
Mesomet´rium, n. Partially muscular peritoneal fold supporting the oviduct.
Mesorhi´nium, n. Portion of bill between the nostrils. (Little used.)
Mesoster´num, n. Middle segment of the breast-bone.
Metacar´pal, a. or n. Pertaining to the metacarpus; particularly the metacarpal bone.
Metacar´pus, n. Hand, exclusive of the fingers; segment of the wing between the carpus and the digits.
Metagnath´ous, a. Cross-billed; having the points of the mandibles passing each other on the right and left.
Metatar´sal, a. Pertaining to the metatarsus; particularly the metatarsal bone.
Metatar´sus, n. Foot, exclusive of the toes; segment of the leg between the tarsus and the digits, commonly called the shank, and in descriptive ornithology usually known as the tarsus. The metatarsus, however, has a distal tarsal ossicle confluent with it, so that it is actually tarso-metatarsus. In birds, the metatarsus proper (exclusive of the confluent tarsal bone) consists of three parallel metatarsal bones, more or less completely confluent, and of the associated accessory metatarsal bone which bears the hallux. Compare Tarsus.
Metatar´sus Hal´lucis, n. The accessory metatarsal bone, as just said.