teeth arm
 n.— «Signals is a “teeth” arm (in British parlance)…. To be a Service Commander in Nigeria requires that one have the right type of commission (regular combatant) and belong to a “teeth arm” (i.e. Infantry, Artillery, Armour, Combat Engineers, Intelligence, or Signals).» —“Who is General AO Ogomudia” by Nowa Omoigui Omogui.com Sept. 20, 2004. (source: Double-Tongued Dictionary)

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