Lexic.us

Definition of O

1. Noun. A nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust.

2. Noun. The 15th letter of the Roman alphabet.

3. Noun. The blood group whose red cells carry neither the A nor B antigens. "People with type O blood are universal donors"

Definition of O

1. n. The letter O, or its sound.

2. prep. A shortened form of of or on.

3. a. One.

4. interj. An exclamation used in calling or directly addressing a person or personified object; also, as an emotional or impassioned exclamation expressing pain, grief, surprise, desire, fear, etc.

Medical Definition of O

1. 1. Symbol for oxygen; orotidine. 2. In chemistry, the abbreviation for ortho-. 3. Symbol for a blood group in the ABO system. See ABO blood group, Blood Groups appendix. 4. An abbreviation derived from ohne Hauch (without a film), used as a designation for: 1) antigens that occur in the bacterial cell, in contrast to those in the flagella; 2) specific antibodies for such somatic antigens; 3) the agglutinative reaction between somatic antigen and its antibody. (05 Mar 2000)

Lexicographical Neighbors of O

Nystan nystatin nystatin nystatins Nysten's law nyula Nyx nyxis N chimaerin N glycanase

N line N methyl D aspartate receptor N myc N protein O O O'Beirne O'Beirne's sphincter O'Beirne's valve O'Brien

O'Casey o'clock O'Connor O'Dwyer O'Dwyer's tube o'er O'Flaherty O'Hara O'Hara forceps O'Keeffe

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