heliostat
noun
heliostat is spelled H-E-L-I-O-S-T-A-T: 9 letters. It appears about once in every 47 million words in written English, the 211,986th most frequent word form (wordfreq, 2021 data). As a noun, heliostat means “A device that includes a plane mirror which turns so as to keep reflecting sunlight toward a predetermined target, compensating for the sun's…” (English Wiktionary, September 2026). The plural of heliostat is heliostats.
How many letters and syllables are in heliostat?
| Letters | 9: H-E-L-I-O-S-T-A-T |
|---|---|
| In writing | about once in every 47 million words; the 211,986th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is heliostat?
Heliostat appears about once in every 47 million words in written English, the 211,986th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Forms of heliostat
- heliostats plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does heliostat mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A device that includes a plane mirror which turns so as to keep reflecting sunlight toward a predetermined target, compensating for the sun's apparent motions in the sky. The target may be a physical object, distant from the heliostat, or a direction in space, and is almost always stationary relative to the heliostat, so the light is reflected in a fixed direction.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Heliostat in Spanish, French, German and Portuguese
In the sense device to continuously reflect sunlight toward a predetermined target, almost al:
| Language | Words |
|---|---|
| French | héliostat |
| German | Heliostat |
| Spanish | heliostato, helióstato |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does heliostat come from?
First use appear c. 1747, from New Latin heliostata, from Ancient Greek ἥλιος (hḗlios, “sun”) + Latin status (“stationary”). By surface analysis, helio- + -stat.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).