isolate-n; 2 Senses

Sense Number 1: a person who is socially isolated, a loner

Commentary: ISOLATE[+person][+role][+social][+loner]

These isolates live on the fringes of society, unemployed and often homeless.
He became an isolate after the accident and never went out.

WordNet 0.0 Sense Numbers: 1

Sense Number 2: a culture of microorganisms separated out for study

Commentary: ISOLATE[+collection][+microorganism][+culture][+separated][+for_study]

These isolates are a control group of bacteria.
The Petri dish contained an isolate that may be the cause of the disease.

WordNet 0.0 Sense Numbers: 1a