antiemetic

adjective

1. of or relating to a substance that is useful in the suppression of nausea or vomiting.

noun

2. any such substance.

adjective

1. preventing vomiting

noun

2. any antiemetic drug, such as promethazine or metoclopramide

adj.

1. Preventing or arresting vomiting.

n.

1. An agent that prevents or arrests vomiting.