名詞 headword:

1. a word that is qualified by a modifier
   同義詞：head word
2. a word placed at the beginning of a line or paragraph (as in a dictionary entry)

1. The headwords in this dictionary are in bold type.
   本詞典的詞條用的是粗體字。

head.word

n.（名詞）
A word, phrase, or name, usually set in boldface or other distinctive type, that serves as the heading for an entry in a dictionary, an encyclopedia, or a similar reference work.Also called entry word
標題詞：作為字典、百科全書或類似參書中詞條標題的通常印為黑體或其它特別字體的詞、詞組或名字也作 entry word
Linguistics A word that may be modified by an adjunct.
【語言學】 可以被一個修飾語修飾的詞