Yawning and stretching (as when first waking up)

• Awakener's stretching activity

WordNet Word definitions in WordNet
n. yawning and stretching (as when first waking up)

Wiktionary Word definitions in Wiktionary
n. A stretching and stiffening of the trunk and extremities, as when fatigued and drowsy or on waking, often accompanied by yawning.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
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.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1610s, noun of action from Latin pandiculat- , past participle stem of pandiculari "to stretch oneself," from pandere "to stretch" (see pace (n.)).