BT Ber 8a(31) :בגבבה דעמרא‏ : tuft of wool
See the entire entry for gḇāḇ, gḇāḇā n.m. ball or tuft of fiber

BT Ber 8a(31) :דמיא לחיזרא בגבבה דעמרא‏ : it is like a thorn in a tuft of wool
See the entire entry for ḥzr#6 n.m. a type of palm thorn