Meaning

noun a thin triangular flap of a heart valve

noun part of a compound leaf

noun a small book usually having a paper cover

originEtymology tree English leaf Proto-Indo-European *-lós Proto-Indo-European *-elós Proto-Italic *-elos Latin -lus Latin -ellus Old French -el Proto-Indo-European *-tós Proto-Italic *-tosder.? Late Latin -ittus Old French -et Old French -eletbor. Middle English -let English -let English leaflet From leaf + -let.

Etymology from Wiktionary, CC BY-SA 3.0