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Wiktionary
wordmark

n. 1 (context marketing English) A logotype; a standardized graphic representation of the name of a company or product used for purposes of easy identification. It is is often text with unique typographic treatments. Usually the company name is incorporated together with simple graphic treatments, so that the representation of the word essentially becomes a symbol of the company. 2 (context computing English) A bit in each memory location on some variable-word-length computers (e.g. (w: IBM 1401), (w: IBM 1620)) used to mark the end of a word.

Wikipedia
Wordmark

A wordmark, word mark or logotype is usually a distinct text-only typographic treatment of the name of a company, institution, or product name used for purposes of identification and branding. Examples can be found in the graphic identities of the Government of Canada, FedEx, Microsoft, and Wikipedia. The organization name is incorporated as a simple graphic treatment to create a clear, visually memorable identity. The representation of the word becomes a visual symbol of the organization or product.

In the United States and European Union, a wordmark may be registered, making it a protected intellectual property. In the United States, the term wordmark may refer not only to the graphical representation, but the text itself may be a type of trademark.