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(geometry) at or forming a right angle (to something). / Exactly upright; extending in a straight line toward the centre of the earth, etc. / Independent of or irrelevant to each other; orthogonal.

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perpendicular

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perpendicular

/ˌpɜː.pənˈdɪk.jə.lə(ɹ)/

adj

(geometry) at or forming a right angle (to something). / Exactly upright; extending in a straight line toward the centre of the earth, etc. / Independent of or irrelevant to each other; orthogonal.

The two lines are perpendicular to each other.

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意味（1）

(geometry) at or forming a right angle (to something).

A doorknob of whatever roundish shape is effectively a continuum of levers, with the axis of the latching mechanism—known as the spindle—being the fulcrum about which the turning takes place. Applying a force tangential to the knob is essentially equivalent to applying one perpendicular to a radial line defining the lever.

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