Word Study
lights (root: light)
CIDE DICTIONARY
lights, n. pl. [So called from their lightness.].
The lungs of an animal or bird; -- sometimes coarsely applied to the lungs of a human being. [1913 Webster]
OXFORD DICTIONARY
lights, n.pl. the lungs of sheep, pigs, bullocks, etc., used as a food esp. for pets.
Etymology
ME, noun use of LIGHT(2): cf. LUNG
THESAURUS
lights
arc, arc light, assumption, attitude, bellows, climate of opinion, color filter, common belief, community sentiment, conceit, concept, conception, conclusion, consensus gentium, consideration, ctenidia, dimmer, estimate, estimation, ethos, eye, feeling, floats, flood, floodlight, footlights, foots, gelatin, general belief, gills, idea, impression, judgment, klieg light, light plot, limelight, lungs, marquee, medium, mind, mystique, notion, observation, opinion, personal judgment, point of view, popular belief, position, posture, presumption, prevailing belief, public belief, public opinion, reaction, sentiment, sight, spot, spotlight, stance, theory, thinking, thought, view, way of thinkingFor further exploring for "lights" in Webster Dictionary Online