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Ichthyology

Noun 1. Science that deals with the study of fish (biology-online.org)   Word origin: From Greek: ἰχθύς, ikhthus, “fish”; and λόγος, logos,...

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Ileum

/ˈilēəm/ Noun, pl.ilea 1. The final section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish, the divisions of the small intestine are not as clear and the terms posterior intestine or distal intestine may be used instead of ileum. (wikipedia.org) 2. The last, and usually the longest, division of the small intestine; the part between the jejunum and large intestine. (wiktionary.org) 3. The terminal (or distal) portion of the small intestine, characterized by narrower diameter, numerous Peyer’s patches, fewer circular folds, and smaller, rounder villi on the surface for adsorption of enzymes and absorption of digestive products. (biology-online.org) Word origin: Medical Latin, from ileum, singular created from classical Latin plural ilia “groin, flank,” in classical Latin, “belly, the abdomen below the ribs,” poetically, “entrails, guts.” Sense restriction and form apparently from confusion with Greek eileos. Earlier in English ylioun (late 14c.), from Medieval Latin...

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Ilium

/ˈilēəm/ Noun, pl. ilia 1. The uppermost and the largest bone of the pelvis that is composed of two major parts in humans: the body and the ala. This bone articulates on the inner aspect with the sacrum. (biology-online.org) 2. A bone in the pelvis. (wikipedia.org) 3. The upper and widest of the three bones that make up each side of the hipbone and pelvis. (wiktionary.org) 4. The large broad bone forming the upper part of each half of the pelvis. (Google Dictionary) Word origin: From Latin ilia (plural) “groin,...

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Immunity

/iˈmyo͞onitē/ Noun, pl. immunities 1.(Medical) Resistance of an organism to infection or disease (wikipedia.org); fully protective resistance against infection.(wiktionary.org) 2. Inherited, acquired, or induced resistance to infection by a specific pathogen. (medical-dictionary.thefreedictionary.com) 3. The ability of an organism to resist disease, either through the activities of specialized blood cells or antibodies produced by them in response to natural exposure or inoculation (active immunity) or by the injection of antiserum or the transfer of antibodies from a mother to her baby via the placenta or breast milk (passive immunity). (thefreedictionary.com) 4. The condition of being immune, the protection against infectious disease conferred either by the immune response generated by immunisation or previous infection or by other nonimmunologic factors. (biology-online.org) Word origin: From Old French immunité and directly from Latin immunitatem (nominative immunitas) “exemption from performing public service or charge,” from immunis “exempt, free,” from assimilated form of in- “not, opposite of” + munis “performing...

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