nucleic acid

Spelling & Dictionary Insight

The English entry for nucleic acid is 12 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /njuːˈkliː.ɪk ˈæsɪd/. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "Any acidic, chainlike biological macromolecule consisting of multiple repeat units of phosphoric acid, sugar and purine and pyrimidine bases; they are involved in the preservation, replication and ...".

No misspelling variants are generated for nucleic acid in our index, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: nucleic + acid; named for the fact that in eukaryotes, some of the important actions of such acids are especially associated with the nucleus of the cell. 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 nucleic acid, spelled N-U-C-L-E-I-C- -A-C-I-D, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.