ORGAN n. 6 definitions
A natural part or structure in an animal or a plant, capable of performing some special action (termed its function), which is essential to the life or well-being of the whole; as, the heart, lungs, etc., are organs of animals; the root, stem, foliage, etc., are organs of plants.
OSCULATORY a. 3 definitions
Pertaining to, or having the properties of, an osculatrix; capable of osculation; as, a circle may be osculatory with a curve, at a given point. Osculatory circle. (Geom.) See Osculating circle of a curve, under Circle. -- Osculatory plane (to a curve of double curvature), a plane which passes through three successive…