piaf·fer 
(pyăfər)
(pyăfər)n.
A movement in which a horse trots in place with high action of the legs.
[French, from piaffer, to strut, piaffe.]
- photoreception
- photoreceptive
- photoreceptor
- photoreconnaissance
- photorefractive
- photoresistor
- photorespiration
- photosensitive
- photosensitivity
- photosensitization
- photosensitize
- photosensitizer
- photoset
- photosetter
- photosphere
- photospheric
- photostat
- photosynthate
- photosynthesis
- photosynthesize
- photosynthetic
- photosynthetically
- phototactic
- phototactically
- phototaxis