American Heritage Dictionary
(3)
Century Dictionary
(2)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
Overstimulation of the optic nerve triggers the trigeminal nerve, and this causes the photic sneeze reflex.— Answerbag: Latest Questions in Question Categories
While the larger size of the Earth, means that statistically it is likely to be hit by somewhat larger objects at this time, it is unlikely that any of these would be the 50-100 times more massive objects required to sterilize the planet, and quite possible that no impacts large enough to sterilize the photic zone occurred.— Home
Here, we examine the role of two brain-specific miRNAs, miR-219 and miR-132, in modulating the circadian clock located in the suprachiasmatic nucleus. miR-219 is a target of the CLOCK and BMAL1 complex, exhibits robust circadian rhythms of expression, and the in vivo knockdown of miR-219 lengthens the circadian period. miR-132 is induced by photic entrainment cues via a MAPK / CREB-dependent mechanism, modulates clock-gene expression, and attenuates the entraining effects of light.— CiteULike: Everyone's library
This raises the possibility that the melanopsin cells may be serving as a conduit for photic information detected by the rods and / or cones.— ScienceBlogs Channel : Life Science
Sea level has risen 125 metres since the Pleistocene but the coral animals have kept them in the photic zone because of the symbiotic relationship with algae.— Science News / Features, Blog Entries, Column Entries, Issues, News Items and Book Reviews

Century Dictionary (1)
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