spring line

noun — 2 senses

spring line

noun
1

Nautical, Transport A line stretched longways between a docked vessel and a cleat on the pier, or used during berthing to guide the vessel into its slip; a warp

2

Architecture A line above which an arch starts curving inward.

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.