音标：[in'fekʃәs]
a. 有传染性的, 易传染的
【医】 传染性的
在线英汉词典

infectious的短语、例句：

infectious adj 1 (of a disease) caused by bacteria, etc that are passed on from one person to another （指疾病）传染的, 感染的
Flu is highly infectious. 流感的传染性很强. 2 [usu pred 通常作表语] (of a person) in danger of infecting others (with a disease) （指人）能传染他人（疾病）
While you have this rash you are still infectious. 身上还有这种疹子, 就仍然有传染性. 3 (fig approv 比喻, 褒) quickly influencing others; likely to spread to others 有感染力的; 易传播给他人的
infectious enthusiasm 有感染力的热情
an infectious laugh 有感染作用的笑声.