- The reception of one part within another. - The abnormal reception or slipping of a part of a
tube, by inversion and descent, within a contiguous part of it;
specifically, the reception or slipping of the upper part of the small
intestine into the lower; introsusception; invagination. - The interposition of new particles of formative
material among those already existing, as in a cell wall, or in a
starch grain. - The act of taking foreign matter, as food, into a
living body; the process of nutrition, by which dead matter is absorbed
by the living organism, and ultimately converted into the organized
substance of its various tissues and organs.