From WordNet (r) 3.0 (2006) [wn]:
herbal
adj 1: of or relating to herbs; "herbal tea, herbal medicine"
n 1: tea-like drink made of leaves of various herbs [syn: {herb
tea}, herbal tea, herbal]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Herbal \Herb"al\, a.
Of or pertaining to herbs. --Quarles.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Herbal \Herb"al\, n.
1. A book containing the names and descriptions of plants.
--Bacon.
[1913 Webster]
2. A collection of specimens of plants, dried and preserved;
a hortus siccus; an herbarium. --Steele.
[1913 Webster]