I. quadri- /kwɒdrə, kwɒdrɪ $ kwɑː-/ AmE ( also quadru- , quadr- ) prefix
four or four times:
a quadrilateral (=shape with four straight sides)
a quadruped (=animal with four legs)
II. quadru- /kwɒdrʊ $ kwɑː-/ AmE prefix
another form of ↑ quadri-
I. quadri- /kwɒdrə, kwɒdrɪ $ kwɑː-/ AmE ( also quadru- , quadr- ) prefix
four or four times:
a quadrilateral (=shape with four straight sides)
a quadruped (=animal with four legs)
II. quadru- /kwɒdrʊ $ kwɑː-/ AmE prefix
another form of ↑ quadri-
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012