1796 as a modern mineral name for a rock of porphyritic structure, from porphyry + -ite (2). Related: Porphyritic (early 15c., porphiritike).
pornographic
pornography
porosity
porous
porphyria
porphyrite
porphyry
porpoise
porrect
porridge
porringer
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}