The Collaborative International Dictionary of English v.0.48:
Branchlet \Branch"let\, n. [Branch + -let.] A little branch; a twig. [1913 Webster]WordNet (r) 3.0 (2006):
branchlet n 1: a small branch or division of a branch (especially a terminal division); usually applied to branches of the current or preceding year [syn: branchlet, twig, sprig]