pachyˈdermatocelePath. [f. as prec. + Gr. κήλη tumour.] A tumour arising from hypertrophy of the corium and subcutaneous areolar tissue. 1854V. Mott in Med.-Chirurg. Trans.Ser. ii. XIX. 155 (title) On a peculiar form of tumour of the skin, denominated ‘Pachydermatocele’.1900Lancet 2 June 1593/2.