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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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<strong>Online</strong> <strong>Dictionary</strong> <strong>of</strong> <strong>Invertebrate</strong> <strong>Zoology</strong> 287wall and have a single flagellated chamber.diarthrosis n. [Gr. dis, twice; arthron, joint] An articulationthat permits free movement. diarthrodial a.diarticular a. [Gr. dis, twice; articulus, joint] Said <strong>of</strong>, or pertainingto two joints.diastase, diastatic see amylasediastole n. [Gr. diastole, difference] The regular expansion <strong>of</strong>the heart during which it fills with blood; the relaxatoryphase. diastolic a. see systole.diastomian a. [Gr. dia, through; stoma, mouth] (ARTHRO: Insecta)Pertaining to the orifice, (excluding ostiole), <strong>of</strong> themetathoracic scent gland <strong>of</strong> Heteroptera, consisting <strong>of</strong> apair <strong>of</strong> relatively widely spaced openings. see omphalian.diastomatic a. [Gr. dia, through; stoma, mouth] Through thestomata or pores.diathesis n. [Gr. dia, through; thesis, position] An inheritedconstitutional state whereby an individual is especially vulnerableto a certain type <strong>of</strong> reaction, disease or development.diatom rake (ARTHRO: Insecta) A structure <strong>of</strong> the galea <strong>of</strong>mayfly nymphs composed <strong>of</strong> bristles and pectinated spines,or <strong>of</strong> hairs or spines on the maxillae, functioning in scrapingfood.diaulic a. [Gr. dis, twice; aulos, pipe] 1. With two separateducts open to the surface. 2. (MOLL: Gastropoda) Male andfemale portions with separate gonopores. see monaulic,triaulic.di-axial (ARTHRO: Chelicerata) Pertaining to chelicerae <strong>of</strong> spiderswith the paturon projecting either forward or downwith the fangs moving inward towards each other. see paraxial.diaxon n. [Gr. dis, twice; axon, axis] Having two axes or twoaxis-cylinder processes.diblastula n. [Gr. dis, twice; blastos, bud] (CNID) A coelenterateembryo consisting <strong>of</strong> 2 layers arranged around a centralcavity.dibranchiate a. [Gr. dis, twice; branchia, gills] Having two

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