dictionary form
In Japanese linguistics, the base form of a verb or adjective as it appears in dictionaries; also called the plain form or 終止形.
The dictionary form of verbs ends in the u-row, like 食べる or 行く.
基本形 is a broader term meaning 'base form' and can be used in non-linguistic contexts, while 辞書形 is specifically the dictionary entry form.
Compound of 辞書 (dictionary) and 形 (form). A modern linguistics term.