Strong's Definition
from an unused root meaning to fold back; a spiral step
KJV Usage: winding stair. Compare 3924
STEPBible — Tyndale Abridged Hebrew Lexicon
לוּל (lul) — stairs. staircase, winding stair, shaft or enclosed space with steps or ladder
UBS Dictionary of Biblical Hebrew
noun m
Buildings
spiral staircase = part of building containg a flight of stairs laid out in a circular form; ◄ made out of stone; ► leading from one storey in a building to another
UBS Dictionary of Biblical Hebrew © United Bible Societies, licensed CC BY-SA 4.0.
Brown-Driver-Briggs Hebrew Lexicon
[לוּל] n.[m.] shaft or enclosed space (poss. in wall), with steps or ladder, only pl. 1 K 6:8 ref