anticoagulant a. [Gr. anti, against; L. coagulare, to curdle] Pertaining to any substance that prevents or delays the coagulation of blood.
anticoagulin n. [Gr. anti, against; L. coagulare, to curdle] (ARTHRO) The secretion of certain parasitic species that prevents or delays the coagulation of the host's blood.
anticrista n.; pl. -ae [Gr. anti, against; L. crista, crest] (MOLL: Cephalopoda) A cartilaginous outgrowth of the statocyst wall that protects the macula and crista from sudden iner-tial movements of the endolymph.
anticryptic color A color or color pattern used for concealment by a predator in order to facilitate attack on its prey. see cryptic color, homochromy.
anticus a. [L. anticus, foremost] Anterior; belonging to or toward the front; frontal.
antidiuretic hormone (ARTHRO: Insecta) A diuretic regulatory hormonal mechanism that enhances the rate at which fluid is secreted via the Malpighian tubules, and in certain insects, reduces resorption in the rectum.
antidromic a. [Gr. anti, against; dromos, running] Moving in a direction contrary to normal. see orthodromic.
antigeny a. [Gr. anti, against; genes, producing] Pertaining to sexual dimorphism.
antilysin n. [Gr. anti, against; lyein, to dissolve] Any substance that can counteract lysin.
antimere n. [Gr. anti, against; meros, part] Left and right halves of a bilaterally symmetrical object, or a homologous part repeated in segments arranged around an axis, as in radially symmetrical animals.
antimetabolite n. [Gr. anti, against; metabole, change] Any compound that interferes with normal cellular metabolism.
antimitotic a. [Gr. anti, against; mitos, thread] Refers to the action of physical or chemical agents that produce a consistent deviation in the mitotic cycle.
antimorph n. [Gr. anti, against; morphe, form] A mutant allele that inhibits the production of the ancestral allele.
antineural a. [Gr. anti, against; neuron, nerve] 1. Distal to a nerve. 2. Term used instead of ventral for certain invertebrates, such as Pogonophora. see adneural, subneural.
antiperistalsis n. [Gr. anti, against; peri, around; stalsis, contraction] Peristalsis occurring in reverse; reversed muscular contractions in the digestive tract.
antipodal a. [Gr. anti, against; pous, foot] Diametrically oppo site; located on the opposite side.
antipygidial bristles (ARTHRO: Insecta) In Siphonaptera, bristles located on the seventh abdominal segment.
antirostrum n. [Gr. anti, against; L. rostrum, beak] (ARTHRO: Chelicerata) Terminal segmental appendages of some mites.
antispadix n. [Gr. anti, against; L. spadix, palm branch] (MOLL: Gastropoda) Four modified tentacles opposite the spadix of the male Nautilus, sp.
antisquama n.; pl. -mae [Gr. anti, against; L. squama, scale] (ARTHRO: Insecta) In Diptera, the upper lobe (alula) that moves with the wing; antitegula. see squama.
antistyle n. [Gr. anti, against; stylos, pillar] (ARTHRO: Insecta) The basal segment of the stylifer.
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