intercomn.

1940 C. Olsson in Michie & Graebner Their Finest Hour iv. 61 The others behind me were gossiping as usual on their ‘intercoms’.

1941 War Illustr. 20 Oct. 215/1 The rear gunner, I remember, called up on the inter-com., and said, ‘I hope you chaps see the next one before I do.’

1941 War Illustr. 30 Dec. 383/1 Unable to talk to the others over the ‘intercom.’ because my mouthpiece was not working, I stuck to the controls.

1941 War Illustr. 29 Aug. 93/1 I didn't see the bombs drop, but Mac, the rear-gunner, yelled over the inter-comm in a broad Scots accent—‘There's one on the deck.’

1942 T. Rattigan Flare Path i. 101 He even moaned to me over the intercomm. because he'd shot down a Messerschmitt.

1943 Electronic Engin. 16 140 A is valve set for three-fold communication: tank-commander; tank-tank; intercomm. in tanks.

1949 Electronic Engin. 21 109 Electricians will welcome new chapters on Intercoms (loudspeaking telephones).

1951 J. Steinbeck About Ed Ricketts in J. Steinbeck & E. F. Ricketts Log from ‘Sea of Cortez’ p. xxiv An intercom phone between the basement and the upstairs office.

1964 M. McLuhan Understanding Media ii. xxiv. 236 The close teamwork and tribal loyalty now demanded by electrical intercom again puts the Japanese in positive relation to their ancient traditions.

1967 Lebende Sprachen XII. 137/1 Intercommunication system (intercom), a system of wiring which enables two-way communication between teacher and student(s).

1972 G. Durrell Catch me Colobus iv. 73 The intercom system that we have all over the zoo.

1972 J. Potter Going West 8 The intercom announced the departure of Flight BA 531.