WordReference Random House Learner's Dictionary of American English © 2014
pro•lif•er•ate /prəˈlɪfəˌreɪt/USA pronunciation  v. [no object]-at•ed, -at•ing.

    to increase in number; spread rapidly:Fish proliferated in the warm seas.
pro•lif•er•a•tion /prəlɪfəˈreɪʃən/USA pronunciation n. [uncountable]

Collins Concise English Dictionary © HarperCollins Publishers::

proliferate /prəˈlɪfəˌreɪt/ vb
  1. to grow or reproduce (new parts, cells, etc) rapidly
  2. to grow or increase or cause to grow or increase rapidly
Etymology: 19th Century: from Medieval Latin prōlifer having offspring, from Latin prōlēs offspring + ferre to bear

proˈliferative adj

'proliferate' also found in these entries:

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