ˈsemə̇ˌkōlən, -mēˌk- noun
Etymology: semi- + colon
: a punctuation mark; that is usually used to separate the independent clauses of a compound sentence when the clauses are joined by no connective, when the clauses are joined by a conjunctive adverb, or when the clauses are joined by a coordinating conjunction but are long and contain internal punctuation and that is often used to separate long items in a series