Chunk

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A "chunk" of meteorite in a vault. (TV: Dalek)

By 2012, "chunks" of meteorite were exhibited in Henry van Statten's Vault, as observed by the Ninth Doctor. (TV: Dalek)

According to Petronella Osgood, 'everything' in the UNIT database had been 'heavily corrupted with huge chunks missing'. (AUDIO: Recruits)