Type of Stairs Invented in 480 BC Sicily
This page is the CodyCross answer for the clue below from Home Sweet Home, Group 627, Puzzle 4 (Water Heater).
Question is: Type of Stairs Invented in 480 BC Sicily
and the answer is: SPIRAL
Word Meaning:
SPIRAL — (geometry) A curve that is the locus of a point that rotates about a fixed point while continuously increasing its distance from that point.
Definitions from Wiktionary.