a part of the female part of a flower; "that part of a pistil which has no epidermis, and is fitted to receive the pollen. It is usually the terminal portion, and is commonly somewhat glutinous or viscid." or
in anatomy, a stigma can be a small spot, mark, scar, or a minute hole; -- applied especially to a spot on the outer surface of a Graafian follicle, and to spots of intercellular substance in scaly epithelium, or to minute holes in such spots.
in pathology, a stigma can be a red speck upon the skin, produced either by the extravasation of blood, as in the bloody sweat characteristic of certain varieties of religious ecstasy, or by capillary congestion, as in the case of drunkards.
in geometry, a stigma is a point so connected by any law whatever with another point, called an index, that as the index moves in any manner in a plane the first point or stigma moves in a determinate way in the same plane.
in zoology, a stigma can mean:
One of the external openings of the tracheae of insects, myriapods, and other arthropods; a spiracle.
One of the apertures of the pulmonary sacs of arachnids.
One of the apertures of the gill of an ascidian, and of Amphioxus.