cot : Idioms & Phrases
Bell cot
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noun a small shelter for bells; has a gable or shed roof
bell cote.
WordNet
(Arch.) , a small or subsidiary construction, frequently corbeled out from the walls of a structure, and used to contain and support one or more bells.
Webster 1913
cot death
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noun sudden and unexpected death of an apparently healthy infant during sleep
SIDS; crib death; infant death; sudden infant death syndrome.