Sew·ard 
(sərd), William Henry 1801-1872.
(sərd), William Henry 1801-1872. American politician who as US secretary of state (1861-1869) arranged the purchase of Alaska from Russia (1867), a transaction that critics called "Seward's Folly."
- photorealism
- photorealist
- photorealistic
- photoreception
- photoreceptive
- photoreceptor
- photoreconnaissance
- photorefractive
- photoresistor
- photorespiration
- photosensitive
- photosensitivity
- photosensitization
- photosensitize
- photosensitizer
- photoset
- photosetter
- photosphere
- photospheric
- photostat
- photosynthate
- photosynthesis
- photosynthesize
- photosynthetic
- photosynthetically