Lewis Short
Leucŏnĭcus | Leucŏ-nĭcum, i (noun N) :
* Adj., of or belonging to the Leucŏnes (a people in Gaul), Leuconic: lanae,Mart. 11, 56, 9 dub.: sagae,id. 14, 159, 2, also dub.
* Subst.: , , n., Leuconic wool, Mart. 11, 21, 8.
Charlton T. Lewis, Charles Short, A Latin Dictionary