Metapostscutellum see postscutellum

metapraescutum, metaprescutum n. [Gr. meta, after; L. prae, before; scutum, shield] The prescutum of the metathorax.

metapygidium n. [Gr. meta, after; pyge, rump] (ARTHRO: In-secta) 1. In Dermaptera, the posterior ventral segment of the supra-anal plate. 2. In Coleoptera, the penultimate ter-gite when the elytra are shorter than the abdomen.

metarhabdions [Gr. meta, after; rhabdos, rod] (NEMATA) The cuticularized walls of the metastome. see rhabdion.

metascolex n. [Gr. meta, after; scolex, worm] (PLATY: Cestoda) The posterior portion of a transversely divided scolex.

metascutellum n. [Gr. meta, after; L. scutellum, dim. scutum, shield] (ARTHRO: Insecta) The scutellum of the metathorax.

metasoma n. [Gr. meta, after; soma, body] 1. The posterior region of many invertebrates. 2. (ACANTHO) The posterior part of the body or trunk. 3. (ARTHRO) The abdomen or urosome. 4. (ARTHRO: Chelicerata) In Arachnida, the abdominal body segments and telson; posterior part of opist-hosoma. 5. (ARTHRO: Crustacea) see metasome. 6. (PHORON) The long gonadal region following the mesosoma, and bearing external papillae and chitinous attachment structures. see opisthosoma.

metasome n. [Gr. meta, after; soma, body] (ARTHRO: Crustacea) In Copepoda, a portion of the prosome, consisting of free thoracic somites anterior to the major point of body flexion; or first three abdominal somites; metasoma.

metastasis n.; pl. -ses [Gr. meta, after; stasis, standing] The transfer of pathogenic microorganisms to parts of the body remote from the origin of infection.

metasternal glands (ARTHRO: Insecta) In Formicidae, paired organs in the posterior area of the thorax, opening to the outside near the pleural-sternal margins of the metathorax.

metasternal orifice (ARTHRO: Insecta) In Formicidae, the opening of the metasternal gland.

metasternum n. [Gr. meta, after; sternon, chest] (ARTHRO: Insecta) 1. The sternum or ventral sclerite of the metathorax. 2. For Diptera, see mesepimeron.

metastigmata [Gr. meta, after; stigma, point] (ARTHRO: Insecta) The posterior spiracles of the synthorax.

metastome, metastom n. [Gr. meta, after; stoma, mouth] (NEMATA) The posterior subdivision of a prostome.

metastoma n.; pl. -mata [Gr. meta, after; stoma, mouth] 1. (ARTHRO: Crustacea) The lower lip posterior to the mandibles, usually cleft into paragnaths; hypostoma; hypostome; hypopharynx; labium. 2. (ARTHRO: Insecta) In Orthropera, the hypopharynx.

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