Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 575cules.molecules n.pl. [L. dim. moles, mass] The small particles intowhich any substance can be divided without chemicalchange.Mollusca n.; pl. mollusks, molluscs [L. molluscus, soft] Aphylum of invertebrates with a soft unsegmented body andusually covered with a double or single shell, or having aninternal shell; includes snails, chitons, tusk shells, bivalves,limpets, squids, octopi, etc.molluscicide n. [L. molluscus, soft; caedere, to kill] An agentthat kills snails.molt, moult n. [L. mutare, to change] The periodic process ofloosening and discarding the cuticle, accompanied by theformation of a new cuticla in the process of growth; may bedivided into two distinct processes: apolysis and ecdysis.see pharate.molting fluid 1. Often undetermined fluid that causes theloosening of the old cuticle. 2. (ARTHRO: Insecta) A fluidcontaining chitinase and proteinase that digests theunsclerotised cuticle (except the ecdysial membrane).molting hormone see ecdysonemoltinism n. [L. mutare, to change] Polymorphs of differingstrains or biotypes that undergo a different number of larvalmolts.molula n. [L. dim. mola, mill] (ARTHRO) The dicondylic joint bywhich the tibia articulates with the femur.monacanthid a. [Gr. monos, one; acantha, thorn] (ECHINOD:Asteroidea) Having one row of ambulacral spines.monactinal a. [Gr. monos, one; aktis, ray] (PORIF) Spicule developmentoriginating from a fixed point in one directiononly.monaene a. [Gr. monos, one; triaina, trident] (PORIF) A modifiedtetraxon with only one clad.monarsenous a. [Gr. monos, one; arsen, masculine] Polygamous;having one male to numerous females.monaster n. [Gr. monos, one; aster, star] A unipolar spindlethat results in a nucleus with an unreduced chromosome