equinox
Definition, pronunciation, etymology, and usage for the English word. Free spelling reference powered by Wiktionary.
Letters
7 characters
Language
English
word origin
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Detailed reference entry for the English word "equinox", 7-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Hunspell error dictionaries, and usage frequency ranked against the top 100,000 English words in the Wordfreq corpus. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "equinox" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "equinox" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.
equinox is aEnglishnoun. It means: One of two times in the year (one in March and the other in September) when the length of the day and the night are equal, which occurs when the sun is directly overhead at the equator; this marks ... Pronounced /ˈɛkwɪnɒks/. Often confused with equine.
| Property | Value |
|---|---|
| Headword | equinox |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈɛkwɪnɒks/ |
| Letters | 7 |
| Frequency rank | #28,191 |
| Misspellings tracked | 9 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Frequency rank visualization
Spelling & Dictionary Insight
The English entry for equinox is 7 letters long, classified as anoun, and transcribed in the International Phonetic Alphabet as /ˈɛkwɪnɒks/. Corpus data places it at rank #28,191 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it.Wiktionary records 5 distinct senses for this headword, so context determines which meaning a reader should apply.
Our Hunspell-derived misspelling index lists 9 documented wrong-spelling variants for equinox, with forms such as "eqiunox", "eqquinox", and "equinnox". Each variant represents a distinct typo pattern that appears often enough in corpora to be worth flagging, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution.It also participates in 1 confusable-pair relationship, "equine", where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: PIE word *nókʷts From Middle English equinox, equinoxe, equynox (“one of the two periods in the year when the day and night are of equal length, equinox; either the zodiac sign Aries or Libra, in which the sun crosses the celestial equator”), from Old Fren… Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is equinox, spelled E-Q-U-I-N-O-X, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.
Definition
- 1One of two times in the year (one in March and the other in September) when the length of the day and the night are equal, which occurs when the sun is directly overhead at the equator; this marks the beginning of spring in one hemisphere and autumn in the other.
- 2The circumstance of a twenty-four hour time period having the day and night of equal length.
- 3One of the two points in space where the apparent path of the Sun intersects with the equatorial plane of the Earth.
- 4A gale (“very strong wind”) once thought to occur more frequently around the time of an equinox (sense 1), now known to be a misconception; an equinoctial gale.
- 5A celestial equator (“great circle on the celestial sphere, coincident with the plane of the Earth's equator (the equatorial plane)”); also, the Earth's equator.
Etymology
PIE word *nókʷts From Middle English equinox, equinoxe, equynox (“one of the two periods in the year when the day and night are of equal length, equinox; either the zodiac sign Aries or Libra, in which the sun crosses the celestial equator”), from Old French equinoce, equinoxe (modern French équinoxe), or from its etymon Medieval Latin ēquinoxium, ēquinoctium, from Latin aequinoctium (“equinox”), from aequus (“equal”) + nox (“night”) (ultimately derived from Proto-Indo-European *nókʷts (“night”)) + -ium (suffix forming abstract nouns). The Latin word, ultimately adopted in Middle English and modern English, displaced Old English efnniht (modern English evennight). The rare alternative plural form equinoctes treats equinox as if it were a Latin word; the plural of Latin nox (“night”) is noctēs.
This word in other languages
Common misspellings
Also misspelled as: eqiunox,eqquinox,equinnox,equinoxx,equinxo,equionx,equniox,euqinox,qeuinox
Misspelling Pattern Breakdown
Relative frequency of common misspelling types for equinox
Misspelling Variants of "equinox"
Frequency rank: #28,191 in English
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Nearby English words
Other entries that begin with the letter E in our English index: