Test-card Definition
noun
(optometry) A card printed with various letters or symbols, used in testing vision.
Wiktionary
(UK, television) A test signal, typically broadcast at times when the transmitter is active but no programme is being broadcast (often at startup and closedown).
Wiktionary
Other Word Forms of Test-card
Noun
Singular:
test-card
Plural:
test-cardsRelated Articles
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