hyoscyamus

noun

"hyoscyamus" is a 10-letter English headword indexed on PlainSpell.

The verdict

“hyoscyamus” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
10
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Any of the genus Hyoscyamus of henbanes.

Corpus desk

Index EN-hyoscyamus · hyoscyamus · English

hyoscyamus · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 10 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "H" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for hyoscyamus
PropertyValue
Headwordhyoscyamus
LanguageEnglish
Part of speechNoun
Letters10
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “hyoscyamus” in English

hyoscyamusfalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

hyoscyamus is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.

No generated misspelling entries exist for hyoscyamus in our index, since its letter sequence doesn't invite the usual edit-distance slips. It is not paired with a close-neighbour confusable in our dataset, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From the genus name. The correct English form is hyoscyamus, spelled H-Y-O-S-C-Y-A-M-U-S.

Definition

  1. 1
    Any of the genus Hyoscyamus of henbanes.
  2. 2
    The leaves of black henbane (Hyoscyamus niger), used in neuralgic and pectoral troubles.

Etymology

From the genus name.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "hyoscyamus"?
"hyoscyamus" is spelled H-Y-O-S-C-Y-A-M-U-S.
What does "hyoscyamus" mean?
As a noun, "hyoscyamus" means: Any of the genus Hyoscyamus of henbanes.
What is the origin of the word "hyoscyamus"?
From the genus name. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list