insulino-, insulin-, insula-, insulo-, insul-, isle

(Latin: island; derived from insul[a], "island" [used here in reference to the islands [islets] of Langerhans, irregular structures in the pancreas that produce the protein hormone insulin which is secreted into the blood where it regulates sugar metabolism])

thermal insulation
A general term for any material or assemblage of materials used to provide resistance to heat flow.