Words · Meanings · Passages
Lexicon
Terms from the books in the Diotimos library, with definitions, translation notes, and links to their passages.
4,297 entries across 21 collectionsTerms beginning with O
37–71 of 71
On Nature and Purifications
Peri physeōs is the conventional title On Nature; Katharmoi means Purifications.
Empedocles’ Complete Fragments, Volume I · Empedocles’ The Testimonia, Volume II
One
The neuter of “one” can be made into a substantive, “the One.” The resulting expression may serve different numerical or philosophical functions; capitalization in English is not a guarantee of one doctrine.
Stobaeus, Volume I
One and many
The opening of B 17 uses a stark numerical contrast: one grows out of many, and many grow out of one.
Empedocles’ Complete Fragments, Volume I · Empedocles’ The Testimonia, Volume II
One another
Allēlōn means of one another; with case changes, to or towards one another.
Lysis
One comprehension and indivisible sensation
Comprehensio is an integrated grasp of an object; comprehendens names what grasps it.
Marsilio Ficino’s Platonic Theology, Volume II
One, many, and the claim to one craft
Heis is one; the feminine mia and neuter hen belong to the same numeral.
The Lovers
One’s own and what belongs to others
The substantivised phrases τὰ ἑαυτοῦ and τὰ αὑτοῦ mean one's own things or affairs, with the referent supplied by context.
Charmides · Alcibiades I+1 book
Only and nothing else
Monē, a feminine adjective, can mark a particular knowledge as the only one of its kind.
Charmides
Opinion
Opinion is an adopted or held view; holding it and establishing its truth are different questions.
The Notebooks of Joseph Joubert, Volumes I–II
Opportune time
Kairos is the fitting or decisive moment, distinguished from time merely passing.
Stobaeus, Volume I
Opposition in perception
Enantios means opposite or contrary; anomoios means unlike.
Empedocles’ The Testimonia, Volume II
Oppression
Oppression describes the destructive use of a superior position and the condition imposed on those beneath it.
The Notebooks of Joseph Joubert, Volumes I–II
Oracle
Chrēsmos is an oracle or divinely authorized utterance.
Stobaeus, Volume I
Oracle of the heart
Adytum is an inner or restricted shrine; responsa are answers, especially apt for oracular replies.
Empedocles’ The Testimonia, Volume II
Oracle singers Bakis Sibyl and Amphilytus
Chrēsmōdos is an oracle-singer or utterer of oracles, formed with the language of oracular response and song.
Theages
Oratory and laboratory
Oratorium and Laboratorium name the paired settings of the final practical exhortation.
Heinrich Khunrath’s Magnesia Catholica Philosophorum
Order
Taxis denotes order or arrangement.
Stobaeus, Volume I · The Notebooks of Joseph Joubert, Volumes I–II+2 books
Order and disorder
Τάξις is order or arrangement and ἀταξία its absence or disruption.
Empedocles’ The Testimonia, Volume II
Order and orderly conduct
Kosmiōs means in an orderly, decorous or well-behaved manner.
Charmides
Order intelligence and the reversal of the many
Taxis is order or arrangement; ataxia lack of order.
Epinomis
Orestes
Orestes is the matricide whose case connects ignorance of the best with knowledge of a particular person.
Alcibiades II
Organical parts
Similar parts are bodily materials understood as uniform in kind: dividing them produces more of the same substance.
The Anatomy of Melancholy
Organization
Organisation often concerns the bodily arrangement and disposition of organs, not the administration of a group.
The Notebooks of Joseph Joubert, Volumes I–II
Organs and brain
Organs are bodily instruments or sites of activity; cerveau is the brain, while chair names flesh.
The Notebooks of Joseph Joubert, Volumes I–II
Orient
Orient means brilliant, lustrous, or radiantly precious, carrying associations of the rising sun and fine jewels.
Centuries of Meditations
Origin and root
This grouped image family names where something begins, is nourished, or takes its first departure.
The Notebooks of Joseph Joubert, Volumes I–II
Original sin
Original sin names humanity’s fallen condition as related to Adam, distinguished from actual sins committed in particular acts.
Centuries of Meditations
Originality
Originality names a natural individual cast of mind or expression.
The Notebooks of Joseph Joubert, Volumes I–II
Ornament
Ornement can enrich appearance without being intrinsically opposed to truth, but excess or a misleading model can make it objectionable.
The Notebooks of Joseph Joubert, Volumes I–II · Centuries of Meditations
Ornament and distinction
Kosmos means ornament, distinction; something that enhances its possessor.
Lysis
Orpheus and divine names
Orpheus and the Orphics are named authorities for divine descriptions and hymnic sayings.
Marsilio Ficino’s Platonic Theology, Volume I
Orpiment
Orpiment is separately named beside arsenic in the primary margin of page 76.
Heinrich Khunrath’s Magnesia Catholica Philosophorum
Ossian and the bards
A barde is a poet-singer associated here with the Scottish Highlands and the Ossianic world of heroic memory.
René
Ostrich and egg
Struthii is the genitive identifying the ostrich; oculus is its eye, ovum its egg, and fovere warming or brooding.
Marsilio Ficino’s Platonic Theology, Volume I
Outward flow and rational life’s return
Ficino varies verbs of flow to distinguish going out, dispersing, entering another, ebbing away, returning and overflowing back.
Marsilio Ficino’s Platonic Theology, Volume II
Books in the Lexicon
October 2026
Plato’s Alcibiades I Lexicon
Alcibiades I · Plato
176 entries · 701 subsidiary terms
October 2026
Plato’s Alcibiades II Lexicon
Alcibiades II · Plato
94 entries · 290 subsidiary terms
October 2026
Traherne Lexicon
Centuries of Meditations · Thomas Traherne
471 entries · 0 subsidiary terms
October 2026
Plato’s Charmides Lexicon
Charmides · Plato
173 entries · 777 subsidiary terms
October 2026
Empedocles Lexicon
Empedocles, Volumes I–II · Empedocles of Acragas
490 entries · 0 subsidiary terms
October 2026
Plato’s Epinomis Lexicon
Epinomis · Plato
77 entries · 1,061 subsidiary terms
October 2026
Flatland Literary Lexicon
Flatland: A Romance of Many Dimensions · Edwin A. Abbott
85 entries · 476 subsidiary terms
October 2026
Khunrath Lexicon
Heinrich Khunrath’s Magnesia Catholica Philosophorum · Heinrich Khunrath
326 entries · 0 subsidiary terms
October 2026
Plato’s Hipparchus Lexicon
Hipparchus · Plato
90 entries · 291 subsidiary terms
October 2026
Baudelaire Literary Lexicon
Intimate Journals · Charles Baudelaire
80 entries · 323 subsidiary terms
October 2026
Plato’s Lysis Lexicon
Lysis · Plato
239 entries · 0 subsidiary terms
October 2026
Ficino’s Platonic Theology, Volume I Lexicon
Marsilio Ficino’s Platonic Theology, Volume I · Marsilio Ficino
231 entries · 1,313 subsidiary terms
October 2026
Ficino’s Platonic Theology, Volume II Lexicon
Marsilio Ficino’s Platonic Theology, Volume II · Marsilio Ficino
148 entries · 1,398 subsidiary terms
October 2026
Plato’s Minos Lexicon
Minos · Plato
54 entries · 506 subsidiary terms
October 2026
René Literary Lexicon
René · François-René de Chateaubriand
81 entries · 275 subsidiary terms
October 2026
Stobaeus Lexicon
Stobaeus, Volume I · John Stobaeus
610 entries · 85 subsidiary terms
October 2026
Burton’s Anatomy of Melancholy Lexicon
The Anatomy of Melancholy · Robert Burton
103 entries · 3,864 subsidiary terms
October 2026
Guérin Lexicon
The Green Notebook · Maurice de Guérin
165 entries · 0 subsidiary terms
October 2026
Plato’s Lovers Lexicon
The Lovers · Plato
83 entries · 361 subsidiary terms
October 2026
Joubert Lexicon
The Notebooks of Joseph Joubert, Volumes I–II · Joseph Joubert
459 entries · 110 subsidiary terms
October 2026
Plato’s Theages Lexicon
Theages · Plato
62 entries · 510 subsidiary terms