O·le·nek 
(ŏl′ən-yôk, ə-lə-nyôk)
(ŏl′ən-yôk, ə-lə-nyôk) A river of northeast Russia flowing about 2,170 km (1,350 mi) east then north to the Laptev Sea.
- photonics
- photonuclear
- photo-offset
- photo op
- photo opportunity
- photoperiod
- photoperiodic
- photoperiodism
- photophilic
- photophilous
- photophobia
- photophobic
- photophore
- photophosphorylation
- photopia
- photopic
- photoplay
- photopositive
- photoproduct
- photoreaction
- photorealism
- photorealist
- photorealistic
- photoreception
- photoreceptive