Source : Webster's Revised Unabridged Dictionary (1913)

Pulu \Pu"lu\, n.
   A vegetable substance consisting of soft, elastic, yellowish
   brown chaff, gathered in the Hawaiian Islands from the young
   fronds of free ferns of the genus {Cibotium}, chiefly {C.
   Menziesii}; -- used for stuffing mattresses, cushions, etc.,
   and as an absorbent.