Initialism of insulated concrete form. / Initialism of inertial confinement fusion. / Initialism of Internet Connection Firewall.

(Hinduism, Sikhism) A bead or a set of beads commonly used by Hindus and Buddhists for keeping count while reciting, chanting, or mentally repeating a mantra or the name or names of a deity.

(uncountable) A coupon-based system of hitchhiking. / (countable) An automatic stopping mechanism or system.

(dated, mathematics) quadrature of the circle