A sloping roof or architectural feature that extends from a main roof down to a lower wall, creating extra interior space; common in older houses.
From 'cat' (possibly from the slanted shape resembling a cat's back) plus 'slide' from Old English 'slidan' meaning to slip; an architectural term that emerged in medieval English house-building.
Catslides are real architectural features in old British houses, and the name probably came from people thinking the curved roof looked like a cat's arched back—which shows how everyday observations became building terminology!
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