late 14c., from Latin papyrus "the paper plant, paper made from it," from Greek papyros "any plant of the paper plant genus," said to be of Egyptian origin. Proper plural is papyri.
"Producing or yielding papyrus or paper", Mid 17th cent.; earliest use found in Thomas Blount (1618–1679), antiquary and lexicographer. From classical Latin papȳrifer papyrus-bearing (from papȳrus + -fer) + -ous; compare -ferous.