INSULATING

Verb

insulating

present participle of insulate

Adjective

insulating (comparative more insulating, superlative most insulating)

That insulates.

Source: Wiktionary

INSULATE

In"su*late, v. t. [imp. & p. p. Insulated; p. pr. & vb. n. Insulating.] Etym: [L. insulatus insulated, fr. insula island. See Isle, and cf. Isolate.]

1. To make an island of. [Obs.] Pennant.

2. To place in a detached situation, or in a state having no communication with surrounding objects; to isolate; to separate.

3. (Elec. & Thermotics)

Definition: To prevent the transfer o Insulating stool (Elec.), a stool with legs of glass or some other nonconductor of electricity, used for insulating a person or any object placed upon it.

Source: Webster’s Unabridged Dictionary 1913 Edition