Standard Lemma guide

heliac

adj · noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

No pronunciation record was provided for this word.

1

adj

Meaning 1

Alternative form of heliacal.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative, not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A stellarator in which the magnetic axis (and plasma) follows a helical path to form a toroidal helix rather than a simple ring shape.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adjective

Meaning 3

pertaining to or near the sun; especially the first rising of a star after and last setting before its invisibility owing to its conjunction with the sun

Definition source: Princeton WordNet 3.0

Examples

  • the heliacal rising of the Dog Star
  • the heliacal or Sothic year is determined by the heliacal rising of Sothis (the Egyptian name for the Dog Star)

Meaning relationships

Synonyms: heliacal

Antonyms: none provided

History

Etymology

Short for helical accelerator.