armature
‘protective covering of a plant or animal, an armour’
Lexical development traced from the Tamil root:
E. armature < Lat. armatura ‘armor, equipment’ < armatus < armare ‘to arm, furnish withweapons,’ related to arma ‘weapons, tools’ < aam < ar(ə)mo < ar- < Tamil ār
Semantic evolution: 15th century ‘armor’; 1660s ‘protective covering of a plant or animal’; 1835 a coil of wire that rotates in a magnetic field causing an electric motor to move.