Definition of test pattern in English:

test pattern

Syllabification: test pat·tern

Entry from US English dictionary

noun

A geometric design broadcast by a television station so that viewers can adjust the quality of their reception.

Definition of test pattern in:

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Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up