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chalk [chalks]▼(a piece of chalk used for drawing and on a blackboard)noun[UK: tʃɔːk] [US: ˈtʃɑːk]
chalk [chalks]▼(a soft, white, powdery limestone)noun[UK: tʃɔːk] [US: ˈtʃɑːk]
Cretaceous▼(geologic period within the Mesozoic)proper noun[UK: krɪ.ˈteɪ.ʃəs] [US: krə.ˈteɪ.ʃəs]
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