The Collaborative International Dictionary of English v.0.48:
Pandiculation \Pan*dic`u*la"tion\, n. [L. pandiculari to stretch one's self, fr. pandere to spread out.] A stretching and stiffening of the trunk and extremities, as when fatigued and drowsy. [1913 Webster]WordNet (r) 3.0 (2006):
pandiculation n 1: yawning and stretching (as when first waking up)