perpendicular

English

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Etymology

From Middle French perpendiculaire, from Old French perpendiculer, from Latin perpendiculum (plumb line).

Pronunciation

• (UK) IPA(key): /ˌpɜː.pənˈdɪk.jə.lə(ɹ)/ enPR: pû"pəndĭ'kyələ(r),
• (US) IPA(key): /pɝ.pɛnˈdɪk.ju.lɚ/, /pɝ.pənˈdɪk.jə.lɚ/
•  Audio (US): (file)
• Rhymes: -ɪkjʊlə(ɹ)

perpendicular (comparative more perpendicular, superlative most perpendicular)

1. (geometry) At or forming a right angle (to something).
Synonyms: normal, orthogonal
In most houses, the walls are perpendicular to the floor.
• 2012 March, Henry Petroski, “Opening Doors”, in American Scientist[1], volume 100, number 2, pages 112–3:
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.
2. Exactly upright; extending in a straight line toward the centre of the earth, etc.
3. Independent of or irrelevant to each other; orthogonal.
• 2019 May 31, David M. Willis, “Wrangled”, in Dumbing of Age:
Hey, I'm not unsabotaging anything! This is completely perpendicular sabotage!

Noun

perpendicular (plural perpendiculars)

1. (geometry) A line or plane that is perpendicular to another.
2. A device such as a plumb line that is used in making or marking a perpendicular line.
3. () A meal eaten at a tavern bar while standing up.

Translations

• (This symbol can be pronounced “perp” when used as a subscript of a letter representing a vector.)

Catalan

Pronunciation

perpendicular m or f (masculine and feminine plural perpendiculars)

1. perpendicular

Noun

perpendicular f (plural perpendiculars)

1. perpendicular

Portuguese

Pronunciation

• (Portugal) IPA(key): /pɨɾ.pẽ.di.kuˈlaɾ/
• (Southern Portugal) IPA(key): /pɨɾ.pẽ.di.kuˈla.ɾi/

• Hyphenation: per‧pen‧di‧cu‧lar

perpendicular m or f (plural perpendiculares)

1. perpendicular

Noun

perpendicular f (plural perpendiculares)

1. perpendicular

Romanian

Noun

perpendicular f (plural perpendiculare)

1. perpendicular

Spanish

Pronunciation

• IPA(key): /peɾpendikuˈlaɾ/ [peɾ.pẽn̪.d̪i.kuˈlaɾ]
• Rhymes: -aɾ
• Syllabification: per‧pen‧di‧cu‧lar