foliate (v.) Look up foliate at Dictionary.com
1660s (implied in foliated), "to apply silver leaf," from Medieval Latin foliatus "leaved, leafy," from Latin folium "a leaf" (see folio). Meaning "put forth leaves" is from 1775. Related: Foliated; foliating.
foliate (adj.) Look up foliate at Dictionary.com
1620s, "beaten into thin sheets," from Medieval Latin foliatus "leaved, leafy," from Latin folium "a leaf" (see folio). As "leaf-like" from 1650s.