main entry (in a dictionary)
Technical term used in lexicography; refers to the primary headword entry, as opposed to a sub-entry (子見出し).
See also: 子見出し
In this dictionary, the main entries are displayed in bold.
Compound of 親 (oya, 'parent; main') and 見出し (midashi, 'heading; entry'). The exact historical derivation is uncertain, but the term is a conventional lexicographic coinage.