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Obligate parasite

1. A parasitic organism that cannot complete its life cycle without exploiting a suitable host. If an obligate parasite cannot obtain a host it will fail to reproduce. (wikipedia.org) 2. An organism that occurs in intimate association with, and which is wholly dependent for its nutrition on, another living organism (Holliday,...

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Obturator

/ˈäbt(y)əˌrātər/ Noun, pl. obturators 1. (Surgery) An object used to obstruct a hole, such as a fissure of the palate. (wiktionary.org); an apparatus designed to close an unnatural opening, as a fissure of the palate. (biology-online.org) 2. A prosthesis used to close an opening (as to close an opening of the hard palate in cases of cleft palate. (wordnetweb.princeton.edu) Word origin: From Latin obtūrō “to stop, block...

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Obturator foramen

1. The hole created by the ischium and pubis bones of the pelvis through which nerves and blood vessels pass. (wikipedia.org) 2. An opening that is the largest foramen in the human body, is situated between the ischium and pubis of the hip bone, and is closed by the obturator membrane except for the obturator canal. (merriam-webster.com) 3. A large opening in the hipbone between the pubis and the ischium. (Google Dictionary) 4. An opening situated between the public and ischial parts of the innominate bone and closed by the obturator membrane; the thyroid foramen. Word origin: From Latin foramen “hole, opening, aperture, orifice,” from forare “to...

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Occiput

/ˈäksəpət/ Noun, pl. occipita 1. The anatomical term for the posterior (back) portion of the head or skull. In insects, the occiput is the posterior part of the head capsule. (wikipedia.org) 2. The back part of the head or skull (contradistinct from sinciput). (wiktionary.org) Word origin: From Latin occiput, occipitium “the back part of the head”, from ob “over against” + caput...

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Occlusion

/əˈklo͞oZHən/ Noun, pl. occlusions (Medicine) 1. Anything that obstructs or closes a vessel or canal. (wiktionary.org) 2. The alignment of the teeth when upper and lower jaws are brought together. (wiktionary.org) 3. The relationship between all of the components of the masticatory system in normal function, dysfunction and parafunction. (biology-online.org) 4. Momentary complete closure of some area in the vocal tract, causing stoppage of the breath and accumulation of pressure. (biology-online.org) (Physics) The absorption of a gas or liquid by a substance such as a metal. (wiktionary.org) (Meteorology) 1. An occluded front. (wiktionary.org) 2. The process of occluding air masses. (merriam-webster.com) (Linguistics) 1. A closure within the vocal tract that produces an oral stop or nasal stop. (wiktionary.org) 2. Closure at some point in the vocal tract that blocks the flow of air in the production of an oral or nasal stop. (merriam-webster.com) (Computing) The blocking of the view of part of an image by another. (wiktionary.org) (General definition) 1. The process of occluding, or something that occludes. (wiktionary.org) Word origin: From Medieval Latin occlusionem (nominative occlusio), noun of action from past participle stem of Latin occludere (past participle occlusus) “shut up, close up,” from ob “against, up” + claudere “to shut,...

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