newly introduced word; new vocabulary item
Typically used in educational contexts for a word that appears for the first time in a lesson or textbook and needs to be learned.
In today's lesson there are ten new vocabulary words.
Let's copy the new words into our notebooks and memorize them.
Compound of 新出 (しんしゅつ, 'newly appearing') + 語 (ご, 'word'). The exact historical derivation is uncertain, but the meaning is transparent from its components.