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From Latin vertere, versus (to turn). See version.


versor (plural versors)

English Wikipedia has an article on:
  1. (quaternion algebra) A quaternion of norm one.
  2. (geometric algebra) A multivector representing a proper or improper rotation.




From versō.



versor (present infinitive versārī or versārier, perfect active versātus sum); first conjugation, deponent

  1. I turn myself around
  2. I move around
  3. I dwell, dwell, live
  4. be in a certain condition
  5. I am occupied, busied, engaged in (in re), pay attention to, practice
    • Caesar, de Bello Gallico VII, 27:
      Suosque languidius in opere versari iussit
      And ordered his [men] to engage in the works more remissly


   Conjugation of versor (first conjugation, deponent)
indicative singular plural
first second third first second third
active present versor versāris, versāre versātur versāmur versāminī versantur
imperfect versābar versābāris, versābāre versābātur versābāmur versābāminī versābantur
future versābor versāberis, versābere versābitur versābimur versābiminī versābuntur
perfect versātus + present active indicative of sum
pluperfect versātus + imperfect active indicative of sum
future perfect versātus + future active indicative of sum
subjunctive singular plural
first second third first second third
active present verser versēris, versēre versētur versēmur versēminī versentur
imperfect versārer versārēris, versārēre versārētur versārēmur versārēminī versārentur
perfect versātus + present active subjunctive of sum
pluperfect versātus + imperfect active subjunctive of sum
imperative singular plural
first second third first second third
active present versāre versāminī
future versātor versātor versantor
non-finite forms active passive
present perfect future present perfect future
infinitives versārī, versārier1 versātum esse versātūrum esse
participles versāns versātus versātūrus versandus
verbal nouns gerund supine
genitive dative accusative ablative accusative ablative
versandī versandō versandum versandō versātum versātū

1The present passive infinitive in -ier is a rare poetic form which is attested for this verb.


  • versor in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • versor in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
  • versor in Gaffiot, Félix (1934) Dictionnaire illustré Latin-Français, Hachette
  • Carl Meißner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • something presents itself to my vision: ante oculos aliquid versatur
    • to be in a dilemma; in difficulties: in angustiis, difficultatibus, esse or versari
    • to be in danger: in periculo esse or versari
    • the position is very critical: res in summo discrimine versatur
    • to be in peril of one's life: in vitae discrimine versari
    • a man's life is at stake, is in very great danger: salus, caput, vita alicuius agitur, periclitatur, in discrimine est or versatur
    • to live in poverty, destitution: in egestate esse, versari
    • to be mistaken: in errore versari
    • to be in gross error, seriously misled: in magno errore versari
    • to be engaged in literary pursuits: in studio litterarum versari
    • to be engaged in any branch of study: in aliquo litterarum genere versari
    • to be an ardent student of..: summo studio in litteris versari
    • to be well (slightly) acquainted with Greek literature: multum (mediocriter) in graecis litteris versari
    • abstruse studies: studia, quae in reconditis artibus versantur (De Or. 1. 2. 8)
    • theoretical, speculative philosophy: philosophia, quae in rerum contemplatione versatur, or quae artis praeceptis continetur
    • practical philosophy: philosophia, quae in actione versatur
    • to be at variance with: in controversia (contentione) esse, versari
    • to be in fear: in timore esse, versari
    • to be in severe pecuniary straits: in summa difficultate nummaria versari (Verr. 2. 28. 69)
    • to have no debts: in suis nummis versari (Verr. 4. 6. 11)
    • to take part in politics: in re publica or in rebus publicis versari
    • to use the same simile, illustration: ut in eodem simili verser



From Latin versus +‎ -or.[1][2]



versor m (plural versores)

  1. (linear algebra) unit vector


  1. ^ versor” in Dicionário infopédia da Língua Portuguesa. Porto: Porto Editora, 2003–2021.
  2. ^ versor” in Dicionário Priberam da Língua Portuguesa.


Alternative forms[edit]


versor m (plural versori)

  1. plough