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jack-in-the-pulpit
jack ladder
jack mackerel
jack-o’-lantern
jack-of-all-trades
jack off
jack pine
jack plane
jack rafter
Jack Robinson
Jack Russell
jack-tar
Jack-the-lad
Jack-the-rags
jack up
jack-up
jackal
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jack rafter

jack raft·er (plural jack raft·ers)


noun 
Definition:
 
U.K. short rafter used in hip roofs: each of a set of sloping timber beams spanning the area between the eaves and the hip rafter of a roof. Each jack rafter is of a different length to fit the changing dimension of the roof plane.

[<jack1 implying "small"]
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