a disease caused by deficiency of niacin or tryptophan (or by a defect in the metabolic conversion of tryptophan to niacin); characterized by gastrointestinal disturbances and erythema and nervous or mental disorders; may be caused by malnutrition or alcoholism or other nutritional impairments
not clearly understood or expressed; "an obscure turn of phrase"; "an impulse to go off and fight certain obscure battles of his own spirit"-Anatole Broyard; "their descriptions of human behavior become vague, dull, and unclear"- P.A.Sorokin; "vague...forms of speech...have so long passed for mysteries of science"- John Locke
not drawing attention; "an unnoticeable cigarette burn on the carpet"; "an obscure flaw"
not famous or acclaimed; "an obscure family"; "unsung heroes of the war"
make obscure or unclear; "The distinction was obscured"
make difficult to perceive by sight; "The foliage of the huge tree obscures the view of the lake"
make undecipherable or imperceptible by obscuring or concealing; "a hidden message"; "a veiled threat"
make less visible or unclear; "The stars are obscured by the clouds"
occurring or done each day; "a daily record"; "day-by-day labors of thousands of men and women"- H.S.Truman; "her day-after-day behavior"; "an every day occurrence"
measured by the day or happening every day; "a daily newspaper"; "daily chores"; "average daily wage"; "daily quota"