cone

[G. konos, a peg.] i. figure having a circular base with sides inclined so as to meet at a point above. 2. One of the flask-shaped figures Conarium or pineal body. 4. The mechanical element of a tooth crown, cusp. c. of light, a bright area seen on inspection of the membrana tympani; it is triangular in shape, extending downward from the umbo, fertiliza'tion c, a protuberance of the cytoplasm of the ovum at the point where the effective spermatozoon is attached, implant a'tion u., the wedge-shaped origin of a neuraxon from the cell body of the neuron, oc'ular c, the cone of light in the interior of the eyeball formed by the rays entering through the pupil and focu ed on the retina.