Transmittable
Part of speech: adjective
Definition: able to be transmitted transmissible
Contagious
Part of speech: adjective
Definition: Of a disease, easily transmitted to others.Of a fashion, laughter, etc., easily passed on to others.Of a person, having a disease that can be transmitted to another person by touch.
Example sentence: Remember that happiness is as contagious as gloom. It should be the first duty of those who are happy to let others know of their gladness.