the act of stretching oneself.
Origin of pandiculation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the act of stretching and yawning, esp on waking
Word Origin for pandiculation
C17: from Latin pandiculari, from pendere to stretch
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1610s, noun of action from Latin pandiculat-, past participle stem of pandiculari "to stretch oneself," from pandere "to stretch" (see pace (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper