These are thrown into a basket containing chaff made from the capsules.
acus, chaff, comes also the distinct meaning of "mixed with chaff."
I have champed up all that chaff about the ego and the non-ego, noumena and phenomena, and all the rest of it, too often not to know that in attempting even to think of these questions, the human intellect flounders at once out of its depth."
Winnowing was done by women, who tossed the grain into the air with small wooden boards, the chaff being blown away by the winds.
Shipping opium is distinguished by its soft character and clean paste, containing very little debris, or chaff, as it is technically called.