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lucubration
noun
°intense and prolonged study or meditation; especially, late at night.
°The product of such study; often, writings.

lucent
adjective
°emitting light; shining; luminous.

elucidate
verb
°To make clear or obvious; to clarify.
°To disambiguate.

photosynthesis
noun
°The process by which plants and other photoautotrophs generate carbohydrates and oxygen from carbon dioxide, water, and light energy in chloroplasts.

photon
noun
°The quantum of light and other electromagnetic energy, regarded as a discrete particle having zero rest mass, no electric charge, and an indefinitely long lifetime. It is a gauge boson.

photogenic
adjective
°Generated or caused by light.
"The sunbather developed a photogenic melanoma on her back."
°Producing or emitting light, luminescent.
"The photogenic bacteria were visible in the dark room."

phosphorescent
adjective
°Having the property of emitting light for a period of time after the source of excitation is taken away, e.g., in electrostatic storage tubes and cathode-ray tubes.
noun
°A phosphorescent substance.

extraneous
adjective
°Not belonging to, or dependent upon, a thing; without or beyond a thing; not essential or intrinsic; foreign.
"to separate gold from extraneous matter"
synonyms: additional, alien, foreign, intrusive

extrovert
noun
°One who is outgoing; sociable or concerned with outer affairs.

extrapolate
verb
°To infer by extending known information.
°To estimate the value of a variable outside a known range from values within that range by assuming that the estimated value follows logically from the known ones.

exterminate
verb
°To kill all of a population, usually deliberate and especially applied to pests.
"We'll use poison to exterminate the rats."
°To bring a definite end to, finish completely. A rather strong word that implies that what has been ended won't resurface.
"''Even a mass birching at the public school failed to exterminate truancy"
synonyms: annihilate, eradicate, extermine, uproot