 Aminjikarai was annexed to Madras District in the year 1946, and Arumbakkam and Anna Nagar were carved out of Aminjikarai in the 1950s and 1970s.The Nelson Manickam Road that traverses through Aminjikarai is an important commercial road in Chennai city.A delta formed from the deposition of the sediment carried by the river Cooum towards its journey to the Bay of Bengal is called Amainda Karai "(which means shaped/formed/created land in Tamil)" and later on Aminjikarai colloquially.