Tri‐nod″al (?), a. [L. trinodis three-knotted; tri- (see Tri-) + nodus knot.] 1. (Bot.) Having three knots or nodes; having three points from which a leaf may shoot; as, a trinodal stem.
2. (Geom.) Having three nodal points.
Webster's Dictionary 1913
Tri‐nod″al (?), a. [L. trinodis three-knotted; tri- (see Tri-) + nodus knot.] 1. (Bot.) Having three knots or nodes; having three points from which a leaf may shoot; as, a trinodal stem.
2. (Geom.) Having three nodal points.