A Chymical Dictionary

Arcanum

Qualities powers and relations · A Chymical Dictionary

At a Glance

The word. A hidden virtue in natural things, capable in this account of enhancement through art.

In the book. The final clause makes art active rather than merely observant.

A place to read. The historical definition below, 1650 dictionary, unnumbered definition page 6; facsimile PDF page 334.

Historical Definition

Arcanum generally means anything hidden. In Paracelsus it means a secret incorporeal virtue in natural things, sharing a perpetual and immortal life derived from heaven; the spagyrical art can also multiply it beyond its former condition.

Meaning

The definition begins broadly and then narrows. In general usage Arcanum names something hidden. In the specifically Paracelsian account reported here, it names an incorporeal virtue in a natural thing. The change of scope matters: a secret in an ordinary narrative need not carry every feature of this philosophical explanation. Conversely, a technical use may concern more than information withheld from the reader.

A virtue is presented as something effective within the natural thing. The entry distinguishes it from an ordinary visible part by calling it incorporeal and linking its life to heaven. We should retain that account in explaining the word, while marking it as the historical author’s account of nature. The sentence does not offer a measurable modern entity corresponding exactly to the hidden virtue.

The connection with life is equally specific. Perpetuity and immortality are attributed to the arcanum, not simply to every material body in which it is found. That distinction helps readers understand how a text can describe a perishable substance and a more enduring power within it without considering the two claims contradictory. It is a distinction within the text’s conceptual scheme, not a demonstration that the power exists independently.

Use in the Book

The final clause makes art active rather than merely observant. Spagyrical work is said to multiply the arcanum beyond its previous condition. The reader should therefore ask what has been enhanced in the account: the whole body, a separated preparation, or the virtue through which the preparation is expected to act. The short definition does not settle those possibilities for every passage.

Compare Astrum, which describes increased virtue and power through particular preparations of sulphur, salt and Mercury. The overlap helps explain why operations can matter to the reading of hidden virtues. It does not make Astrum and Arcanum interchangeable: one entry emphasizes a star or power gained through preparation, while the other begins with a hidden virtue in natural things.

Magisterium supplies a further comparison with a secret extracted from natural things. Its qualification concerning elementary separation is distinctive and must not disappear under a broad summary such as “extract.” Read the entries together as related accounts of what art seeks in nature, keeping their different operations and claimed products visible.

Places to Read

Astrum. A “star” understood as a material’s enhanced power through preparation.

Magisterium. An extracted secret defined by a qualified kind of separation.

Spagiria. A name commonly used for alchemy.

In This Edition

This edition treats the entry as a guide to a historical concept rather than a licence to identify every secret recipe as the same universal substance. When a work calls a preparation an arcanum, its own description should determine the material, operation and expected effect. A dictionary can disclose the conceptual field without reconstructing an unstated procedure.

For readers moving between natural philosophy, medicine and religious language, the entry offers a valuable bridge: natural things are said to contain hidden powers, those powers are linked to heaven, and human art is assigned a role in their enhancement. Each link belongs to the historical explanation. Our commentary makes those relations legible while distinguishing them from claims established by modern observation.

Historical source: 1650 dictionary, unnumbered definition page 6; facsimile PDF page 334 — Facsimile

Sources. A Chymicall Dictionary (1650), s.v. Arcanum ; compare Astrum, Magisterium, Spagiria, Aniadus

See also. Astrum; Magisterium; Spagiria; Aniadus