Wordnet 3.0
ADJECTIVE (1)
1.
having saw-like notches with the notches themselves similarly notched;
The Collaborative International Dictionary of English v.0.48:
Biserrate \Bi*ser"rate\, a. [Pref. bi- + serrate.]
[1913 Webster]
1. (Bot.) Doubly serrate, or having the serratures serrate,
as in some leaves.
[1913 Webster]
2. (Zool.) Serrate on both sides, as some antenn[ae].
[1913 Webster] Bisetose
WordNet (r) 3.0 (2006):
biserrate
adj 1: having saw-like notches with the notches themselves
similarly notched