Wordnet 3.0
NOUN (1)
1.
an acrobatic feat in which the trunk is bent backward from a standing position until the hands touch the floor;
The Collaborative International Dictionary of English v.0.48:
backbend \back"bend\ (b[a^]k"b[e^]nd), n.
1. an acrobatic feat in which the trunk is bent backward from
a standing position until the hands touch the floor.
[WordNet 1.5]
WordNet (r) 3.0 (2006):
backbend
n 1: an acrobatic feat in which the trunk is bent backward from
a standing position until the hands touch the floor