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Wiktionary
in-line skate

alt. A rollerblade: a roller skate with all wheels aligned in a single row along the sole for greater speed and maneuverability. n. A rollerblade: a roller skate with all wheels aligned in a single row along the sole for greater speed and maneuverability.

WordNet
in-line skate

n. a shoe with rollers fixed to the sole in a line [syn: roller blade]