A preposition is a word that indicates location (in, near, beside) or some other relationship (about, after, besides) between a noun or pronoun and other parts of the sentence. A preposition isn't a preposition unless it goes with a related noun or pronoun, called the object of the preposition. Examples: Let's meet before noon. Before is a preposition; noon is its object. We've never met before. There is no object; before is an adverb modifying met. Rule 1.
Not to be confused with enophthalmia. Enophthalmos is the posterior displacement of the eyeball within the orbit due to changes in the volume of the orbit (bone) relative to its contents (the eyeball and orbital fat), or loss of function of the orbitalis muscle. It should not be confused with its opposite, exophthalmos, which is the anterior displacement of the eye.
enema - an injection of a liquid through the anus to stimulate evacuation; sometimes used for diagnostic purposes. clyster. irrigation - (medicine) cleaning a wound or body organ by flushing or washing out with water or a medicated solution. colonic, colonic irrigation - a water enema given to flush out the colon. barium enema - enema in which a contrast medium (usually barium sulfate) is injected into the rectum and X-rays are taken to search for lesions.