Macrosclere see megasclere

macroscopic, macroscopical a. [Gr. makros, large; skopein, to view] Capable of being studied with the unaided eye; megascopic. see microscopic.

macroseptum n. [Gr. makros, large; L. septum, partition] 1. (CNID: Anthozoa) The variously functioning primary septum. 2. (NEMER) In asexual reproduction, a partition across the body marking the plane of subsequent fragmentation.

macrosiphon n. [Gr. makros, large; siphon, tube] (MOLL: Cephalopoda) Internal siphon of certain cuttlefishes, and all octopuses.

macrosymbiont n. [Gr. makros, large; symbios, living together] The larger of two symbiotic organisms.

macrotaxonomy n. [Gr. makros, large; taxis, arrangement] The classification of higher taxa.

macrotrichia n.pl.; sing. -ium [Gr. makros, large; thrix, hair] 1. The larger surface hairs. 2. (ARTHRO: Insecta) The large hairs on the wing membrane.

macrotype n. [Gr. makros, large; typos, type] (CNID: Anthozoa) Modified arrangement of mesenteries consisting mainly of macromesenteries. see microtype.

macrurous a. [Gr. makros, large; oura, tail] Long-tailed.

macula n.; pl. maculae [L. macula, spot] 1. A colored spot of rather large size. 2. A spot level with surrounding surface. 3. (BRYO: Stenolaemata) Prominences, and less commonly flat or depressed areas on colony surfaces regularly spaced among feeding zooids caused by clusters of a few polymorphs, and/or extrazooidal skeleton. see monticule. 4. (MOLL: Cephalopoda) An oval spot on the wall of a statocyst to which a calcareous statolith is attached; gives information on position relative to gravity.

maculate a. [L. macula, spot] Splashed or spotted; blotched.

madrepore n. [L. mater, mother; Gr. poros, friable stone] (CNID) A stony, branched, reef building coral of the order Madreporia.

madreporic plate (ECHINOD: Asteroidea) An enlarged interradial plate on the disc, that connects the water vascular system to the sea.

madreporite n. [L. mater, mother; porus, pore] (ECHINOD) An oral or aboral perforated plate of the water-vascular system connecting with the stone canal; sieve plate.

main bud (BRYO: phylactolaemata) The largest of three bud primordia which occurs on every mature zooid, and is the first to form a new polypide.

major gene Controls production of qualitative phenotypic effects in contrast to its modifiers.

major worker (ARTHRO: Insecta) The largest worker subcaste in social insects; in Formicidae, usually specialized for defense and referred to as a soldier. see media worker, minor worker.

mala n.; pl. malae [L. mala, cheek, jaw] 1. A lobe; ridge or grinding surface. 2. (ARTHRO) a. Part of the maxilla of certain insects. b. Mandible of some myriapods.

malacoid a. [Gr. malakos, soft] Soft textured.

malacology n. [Gr. malakos, soft; logos, discourse] The branch of zoology dealing with mollusks, the animal inside the shell.

malacophilous a. [Gr. malakos, soft; philios, loving] (MOLL: Gastropoda) Being pollinated by the action of gastropods.

malapophysis n.; pl. -ses [L. mala, cheek, jaw; Gr. apophysis, projection] (ARTHRO: Chelicerata) In Acari, the paired anterior region of the infracapitulum.

malar a. [L. mala, cheek] Of or about the cheek region.

malar cavity (ARTHRO: Chelicerata) In Acari, interior of the malapophysis that connects to the pharynx.

male n. [L. mas, a man] An individual that produces sperm cells but not egg cells; designated by cf.

male-cell receptacle (ARTHRO: Crustacea) In Rhizocephala, a pocket or pair of pockets within the mantle cavity of the female where cells of male cyprid undergo spermatogene-sis.

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