Hyponymy [hai'pɔnimi]
n. [语](词义之间的)下义关系,上下位
下义词是事物的具体表现形式或更为具体的说明。
In linguistics, a hyponym is a word or phrase whose semantic range is included within that of another word. For example, scarlet, vermilion, carmine, and crimson are all hyponyms of red (their hypernym).
related: hyponyme, hyponyms,hyponymous