Wordnet 3.0
NOUN (1)
1.
a cassette for audiotape;
The Collaborative International Dictionary of English v.0.48:
audiocassette \audiocassette\ n.
1. a cassette for audio tape.
[WordNet 1.5]
WordNet (r) 3.0 (2006):
audiocassette
n 1: a cassette for audiotape