any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
infection transmitted by inhalation or ingestion of tubercle bacilli and manifested in fever and small lesions (usually in the lungs but in various other parts of the body in acute stages)
the act of playing for stakes in the hope of winning (including the payment of a price for a chance to win a prize); "his gambling cost him a fortune"; "there was heavy play at the blackjack table"