What does a circle with line through it mean?

Electronics: What does this circuit symbol mean? (Circle with horizontal line through it)

Does a bell with a line through it mean you are blocked?

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Does a circle or straight line mean on?

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What does the line through the bond mean? (Organic Chemistry Structures)

What does in line mean?

HOW TO USE THIS IDIOM-- ON THE LINE.what does mean--on the line?

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Graphing Lines in Algebra: Understanding Slopes and Y-Intercepts

constructing a perpendicular line through a point (on the line) - geometry constructions

Calculus 1: Limits & Derivatives (1 of 27) The Tangent Line and The Secant Line - Reviewed

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