monobrow

noun

1. a pair of eyebrows that appear to be connected because of some extra hair growing in the space between them: He had very bushy eyebrows, almost a unibrow.

noun informal

1. the appearance of a single eyebrow as a result of the eyebrows joining above a person’s nose

noun

1. informal a single eyebrow created when the two eyebrows meet in the middle above the bridge of the nose