Definitions
A straight measuring tool used to draw lines or measure length.
Word origin
From Middle English reuler; equivalent to rule + -er.
Used in a sentence
“Take this ruler. […] I want you to measure the glass of the lamp.”
“The carcharhinids are unquestionably the rulers of the seas, because of their abundance, their strength and speed, and their unchallenged position as the number one predators in the marine ecosystem.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer3 curated clues
01“Straight measuring tool”5 letters
02“Tool marked with inches”5 letters
03“Straightedge”5 letters
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