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Diotimos Library · Esotericism & Spirituality Collection · English Edition

Gerhard Dorn and John French

A Chymical Dictionary

An Expanded Diotimos Lexicon of Paracelsian and Alchemical Language

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A Chymical DictionaryFilius unius Diei

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English Edition · Branch 28 of 740

Filius unius Diei

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A Chymical Dictionary

p. 28

Filius unius Diei

Elements principles and the natural world · A Chymical Dictionary

At a Glance

The word. An alternative name for the Philosophers’ Stone.

In the book. Lapis Philosophorum is described as the highest virtue of terrestrial things, giving tincture.

A place to read. The historical definition below, 1650 dictionary, unnumbered definition page 22; facsimile PDF page 350.

Historical Definition

Filius unius Diei is the Philosophers’ Stone.

Meaning

The definition supplies an identification, without explaining the phrase or assigning a duration to the work. The apparent reference to one day in the headword should therefore not be turned into a practical timetable from this gloss alone.

Use in the Book

Lapis Philosophorum is described as the highest virtue of terrestrial things, giving tincture. Filum arsenicale is another name directly referred to the Stone. These links establish recognition across a changing vocabulary, while leaving the surrounding author to explain why a particular name is chosen.

Places to Read

Filum arsenicale. Another name for the Philosophers’ Stone.

Lapis Philosophorum. The philosophers’ stone defined through supreme terrestrial power and its imparting of tincture.

Historical source: 1650 dictionary, unnumbered definition page 22; facsimile PDF page 350 — Facsimile

Sources. A Chymicall Dictionary 1650, s.v. Filius unius Diei

See also. Filum arsenicale; Lapis Philosophorum

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About This Reading Edition

The complete 706 historical definitions of the 1650 English dictionary, modernised and accompanied by expanded Diotimos commentary, reading routes, 15 textual notes and complete linked indexes.

Historical Text

A Chymicall Dictionary, London 1650, English version associated with John French, based on Gerhard Dorn’s Dictionarium Theophrasti Paracelsi. The containing volume also prints Sendivogius and Paracelsus; neither neighboring work changes this dictionary’s attribution.

About This Edition

Complete 706 definition paragraphs with new introduction, commentary, reading guides and indexes; Diotimos Editions, 2026.

Rights

The historical 1650 English text is in the public domain. New introduction, commentary, reading guides and indexes are © 2026 Diotimos Editions and published with the site owner’s authorization.