WordReference Random House Learner's Dictionary of American English © 2015
ˈblood ˌtype, n. [countable]
Physiology blood groupbloodgroup ck:There are four blood types: A, B, AB, and O.

WordReference Random House Unabridged Dictionary of American English © 2015
blood type′. 
See blood group. 

Collins Concise English Dictionary © HarperCollins Publishers::

blood type n
  1. another name for blood group

'blood type' also found in these entries:
A - AB - B - blood group - O

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