vector
意味
- (数学で)ベクトル,方向量
- (ハエ・カなどの)病原媒介昆虫
- (飛行機,ミサイルなどの)進路,軌道
語源
英語の原文（Wiktionary）
The “person or entity that passes along an urban legend or other meme” sense derives from the disease sense. The mathematics sense was coined by Irish mathematician and astronomer William Rowan Hamilton in 1846.