centring
noun
[ ˈsɛnt(ə)rɪŋ ]
• the action or process of placing something in the middle of something else.
• framing used to support an arch or dome while it is under construction.
centre
verb
• occur mainly in or around (a specified place).
• "the textile industry was centred in Lancashire and Yorkshire"
• place in the middle.
• "to centre the needle, turn the knob"
Origin:
late Middle English: from Old French, or from Latin centrum, from Greek kentron ‘sharp point, stationary point of a pair of compasses’, related to kentein ‘to prick’.