[1] : The Collaborative International Dictionary of English v.0.48

pan- \pan-\, panta- \pan"ta-\, panto- \pan"to-\ gr. ?, m., ?,
   neut., gen. ?, all.
   combining forms signifying all, every; as, panorama,
   pantheism, pantagraph, pantograph. pan- becomes pam- before b
   or p, as pamprodactylous.
   1913 webster

[2] : The Collaborative International Dictionary of English v.0.48

panto- \pan"to-\
   see pan-.
   1913 webster
see also:
pan- 

[3] : WordNet (r) 2.0

panto
     n : an abbreviation of pantomime

Panto- >> P Words
Panto-, definition of term: Panto-
panto-_pag1.html