arcanum

[ ahr-key-nuhm ]

noun

, plural ar·ca·na [ahr-, key, -n, uh].

1. Often arcana. secret or arcane knowledge, acquired or understood by only a few:

   If you enjoy the arcana of early baseball, this book is for you.

2. a supposed great secret of nature that the alchemists sought to discover.
3. a secret and powerful remedy; elixir.

arcanum

/ ɑːˈkeɪnəm /

noun

1. sometimes plural a profound secret or mystery known only to initiates
2. a secret of nature sought by alchemists

Word History and Origins

Origin of arcanum¹

First recorded in 1590–1600; from Latin, neuter (used as noun) of arcānus arcane ( def )

Word History and Origins

Origin of arcanum¹

C16: from Latin; see arcane

Example Sentences

Among the ultra-blessed 22 cards in the tarot’s major arcana — that is, the cards that have the power to shift the narrative of destiny — we find “The World.”

From Los Angeles Times

The past four years have been filled with battles over all sorts of election arcana, including one that had long been regarded as an administrative afterthought — little-known state and local boards certifying the results.

From Seattle Times

It’s a solid if typical entry into the Pavement slacker-rock arcana.

From Los Angeles Times

The 56 minor arcana cards — which mirror the pattern of common playing cards — represent “daily challenges and opportunities.”

From Los Angeles Times

Under the arcana of the committee’s rules, however, Mr. Trump cannot simply install someone.

From New York Times