sweat – n. the fluid excreted from the sweat glands of the skin : sweat – v. to produce a clear liquid from your skin when you are hot or nervous

negative – adj. not showing the presence of what is looked for or suspected to be present

sample – n. a small amount of something that gives you information about the thing it was taken from

data – n. facts or information used usually to calculate, analyze, or plan something

odor – n. a particular smell

veterinary – adj. relating to the medical care and treatment of animals

detect – v. to discover or determine the existence, presence, or fact of : detection – n. the act or process of discovering, finding, or noticing something

conduct – v. to plan and do (something, such as an activity)

positive – adj. showing the presence of what is looked for or suspected to be present