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A combining form meaning thick; as, pachyderm, pachydactyl.

A combining form meaning thick; as, pachyderm, pachydactyl.

A prefix to words formed from Greek roots, carrying the notion of thick.

pak'i-, thick, in combination, as adjs. PACHYDAC'TYL, -OUS, having thick digits; PACH'YDERM, thick-skinned--n. one of an order of non-ruminant, hoofed mammals, thick-skinned, as the elephant:--pl. PACH'YDERMS, or PACHYDER'MATA.--adj. PACHYDER'MATOUS, thick-skinned: insensible to impressions.--n. PACHYDER'MIA, a form of elephantiasis in which the skin becomes thick and warty.--adj. PACHYDER'MOID.--ns. PACHY[=E]'MIA, a thickening of the blood--also PACHYÆ'MIA; PACHY'MA, a genus of fungi consisting of tuber-like growths, some of which are now referred to the genus Polyporus--also Tuckahoe, Tuckahoe truffle, or Indian bread; PACHYM[=E]'NIA, a thickening of the skin.--adj. PACHYM[=E]'NIC.--n. PACHYM'ETER, an instrument for measuring small thicknesses, as of paper.--adjs. PACH'YODONT, with thick teeth; PACH'YOTE, with thick ears, as a bat--also n.; PACH'YPOD, having thick feet; PACHYP'TEROUS, having thick wings or fins.--ns. PACHYTH[=E]'RIUM, a South American fossil genus of gigantic edentate mammals; PACHYT'YLUS, a genus of locusts, embracing the dreaded Migratory Locust (Pachytylus migratorius). [Gr. pachys, thick.]