Unadapted borrowing from Latin saccus (“a sack, bag”), from Ancient Greek σᾰ́κκος (sắkkos, “coarse cloth of hair; sack, bag”), from Semitic. Doublet of sac, sack, saco, and sakkos.
释义（英文）
名词Noun
(botany) A bladder or winglike structure found on the pollen grains of many species of conifer. The shape or number of the sacci on a pollen grain can help identify the species it came from.