Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
semiconsciousness is a noun meaning "marginal consciousness". It carries one recorded sense.
marginal consciousness
“his grogginess was caused as much by exhaustion as by the blows”
“someone stole his wallet while he was in a drunken stupor”
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 semiconsciousness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.