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- They both looked quickly about the house and Montag felt his nostrils dilate and he knew that he was trying to track himself and his nose was suddenly good enough to sense the path he had made in the air of the room and the sweat of his hand hung from the doorknob, invisible but as numerous as the jewels of a small chandelier, he was everywhere, in and on and about everything, he was a luminous cloud, a ghost that made breathing once more impossible.p. 127.3
There are no more uses of "dilate" in Fahrenheit 451.
Typical Usage (best examples)