/an"l/ , n.
1. a West Indian shrub, Indigofera suffruticosa, of the legume family, having elongated clusters of small, reddish-yellow flowers and yielding indigo.
2. indigo; deep blue.
[ 1575-85;
an-nil, equiv. to al the + nil indigo nili indigo ( nil ( a ) dark blue + -i fem. n. suffix) ]