monoline

(calligraphy) A font line of consistent width, as occurs when imitating pencil script.

(business) A company operating in only one industry or line of business; often specifically a bank specializing in credit card issuance.

(finance) An insurer specialized in insuring investment-grade securities against loss.

(printing, dated) A type of composing machine in which each line of type is cast as a single slug.

(aquaculture) A length of monofilament line, used for culturing forms of seaweed.

(spectroscopy) A single spectrum line.