pyr'amid

[G. pyramis.] A term applied to a number of anatomical structures having a more or le pyramidal shape. Specifically the petrous portion of the temporal bone, ante'rior p, (of the medulla), pyramis (2). cerebell'ar p., pyramis vermis, poste'rior p. (of the medulla), funiculus gracilis, p. of light, a triangular area at the anterior inferior part of the drum membrane, running from the umbo to the periphery, where there is seen a bright reflection of light, p; of the thyroid, median lobe of the thyroid gland, Lalonette's* p. p. of the tym'panum, eminent i a pyramidal is [BNA]. p. of the ves'tibule, pyramis vestibuli. renal p., pjTamis renal is.