noun
accent nucleus; accent kernel
Linguistics term for the syllable or mora in a word where a pitch drop occurs, marking the accent pattern.
東京方言では、アクセント核の位置によって単語の意味が区別される。
In the Tokyo dialect, word meanings are distinguished by the position of the accent nucleus.
アクセント is the general term for accent or stress, while アクセント核 specifically refers to the location of the pitch drop within a word.
Compound of アクセント (accent) and 核 (nucleus/kernel), a direct calque of the English linguistic term.