tol·er·ant 
(tŏlər-ənt)
(tŏlər-ənt)adj.
1. Inclined to tolerate the beliefs or behavior of others; forbearing: a tolerant attitude.
2. Able to withstand or endure an adverse environmental condition: plants tolerant of extreme heat.
3. Able to digest or metabolize a food, drug, or other substance or compound: people who are lactose tolerant.
[French tolérant, from Latin tolerāns, present participle of tolerāre, to bear; see TOLERATE.]
toler·ant·ly adv.