Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
initialism is a noun meaning "a word formed from the initial letters of the several words in the name and pronounced as one word". It carries 2 recorded senses.
an abbreviation formed from the initial letters of the several words in the name and pronounced separately
“HTML is an initialism for HyperText Markup Language”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for initialism come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.