nucleus

Spelling & Dictionary Insight

The English entry for nucleus is 7 letters long, classified as anoun, and transcribed in the International Phonetic Alphabet as /ˈnjuː.kli.əs/. Corpus data places it at rank #13,203 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it.Wiktionary records 7 distinct senses for this headword, so context determines which meaning a reader should apply.

Our Hunspell-derived misspelling index lists 10 documented wrong-spelling variants for nucleus, with forms such as "nculeus", "nnucleus", and "nuccleus". 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 3 confusable-pair relationships, "nuclei", "nuclear", "nucleic", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: Learned borrowing from Latin nucleus (“kernel, core”). The earliest uses refer to the head of a comet and the kernel of a seed, both recorded in Lexicon Technicum in 1704. The sense in atomic physics was coined by British scientist Michael Faraday in 1844 i… 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 nucleus, spelled N-U-C-L-E-U-S, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.