Plumb bob

Rarity: Rare

A topic known well beyond its field, found in many languages.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

A plumb bob, plumb bob level, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical direction as a reference line, or plumb-line. It is a precursor to the spirit level and used to establish a vertical datum.

Excerpt from the Wikipedia article “Plumb bob”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Buckinghamshire County Council, Jennifer Moss, 2006-02-01 10:54:39, CC BY-SA 4.0, via Wikimedia Commons.