slipway

[slip-wey] /ˈslɪpˌweɪ/
noun, Nautical
1.
(in a shipyard) the area sloping toward the water, on which the ways are located.
3.
a ramp on a factory ship for hauling aboard carcasses of whales for processing.
Origin
1830-40; slip1 + way1
British Dictionary definitions for slipway

slipway

/ˈslɪpˌweɪ/
noun
1.
the sloping area in a shipyard, containing the ways
2.
Also called marine railway. the ways on which a vessel is launched
3.
the ramp of a whaling factory ship
4.
a pillowcase; pillowslip