Phrase guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
No pronunciation record was provided for this word.
noun
A radial, sunburst-like test target used to measure the resolution and image quality of optical instruments, cameras, scanners, and printers.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: spoke target
Antonyms: none provided
History
Developed in the 1930s by Siemens & Halske AG to test the lenses of their narrow-film cameras.
