/ tjuːˈmesnt; NAmE tuː-/ adjective
( formal ) ( especially of parts of the body ) larger than normal, especially as a result of sexual excitement
SYN swollen
► tu·mes·cence / -sns; NAmE / noun [ U ]
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WORD ORIGIN
mid 19th cent.: from Latin tumescent- beginning to swell, from the verb tumescere , from tumere to swell.