PTO.
Initialism of Patent and Trademark Office
Meaning & usage
Initialism of Patent and Trademark Office
Initialism of Patent and Trademark Office United States Patent and Trademark Office.
Initialism of parent-teacher organization.
Initialism of paid time off.
Initialism of power take-off, a powered shaft for driving auxiliary equipment.
Initialism of pick-to-order.
Initialism of please turn over (written at the end of the text on a page to say that it continues overleaf).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.