Site Map | FAQ

• Editor's Favorites
  • American Indian Heritage Month
  • 2010 Calendar
  • 2009 Calendar and Holidays
  • Twilight Page
  • Veterans Day
  • Countries of the World
  • 2009 Current Events
  • Top 50 U.S. Cities
  • Color Psychology
  • Holidays in America
  • Most Popular Names
  • The Fifty States

Dictionary

ABO system

Physiol.a classification of human blood based on the presence on the surface of red blood cells of one or both of two specific antigens, designated A and B, or their absence, designated O: every person has one of four possible inherited blood types, A, B, AB, or O, and has antibodies circulating in the blood that clump with any antigen that is not of that type, persons with type O thus being able to donate blood devoid of the antigens for transfusion to types A, B, and AB but able to receive only blood of type O.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

abortus

aboudikro

• • Cite
  • Print
  • Email
  • Bookmark
    • Add bookmark
    • Add to del.icio.us
    • Digg It!
    • Add to Reddit

Related Content Daily Word Quiz: majuscule Analogy of the Day: Today's Analogy Spelling Bee: Today's Spelling Bee Kids' Word Quiz: miscreant Crossword: Crossword Puzzle Guide Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language

Find definitions for: