semirecta.
ray, half-line; a part of a line starting at a point and extending infinitely in one direction.
Meaning & usage
ray, half-line; a part of a line starting at a point and extending infinitely in one direction.
Sēmirēcta ab $A$ in infinitum prōdūcitur.
Where this word comes from
From sēmi- (“half”) + rēcta (“straight line”). The term is attested in early modern scientific manuscripts (e.g. in the Galileo codices, see References) and is used in modern Latin to distinguish the geometric concept from radius.
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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.