PRIMAL
\pɹˈa͡ɪmə͡l], \pɹˈaɪməl], \p_ɹ_ˈaɪ_m_əl]\
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serving as an essential component; "a cardinal rule"; "the central cause of the problem"; "an example that was fundamental to the argument"; "computers are fundamental to modern industrial structure"
By Princeton University
Word of the day
international pitch
- the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C