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| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
carcinogen car·cin·o·gen (kär-sĭn'ə-jən, kär'sə-nə-jěn')
n.
A cancer-causing substance or agent.
| carcinogen (kär-sĭn'ə-jən) Pronunciation Key
A substance or agent that can cause cells to become cancerous by altering their genetic structure so that they multiply continuously and become malignant. asbestos, DDT, and tobacco smoke are examples of carcinogens. |