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O
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
The blood group whose red cells carry neither the A nor B antigens
Example:
people with type O blood are universal donors
Synonyms:
group O; O; type O
Classified under:
Hypernyms ("O" is a kind of...):
blood group; blood type (human blood cells (usually just the red blood cells) that have the same antigens)
Sense 2
Meaning:
The 15th letter of the Roman alphabet
Classified under:
Nouns denoting communicative processes and contents
Hypernyms ("O" is a kind of...):
alphabetic character; letter; letter of the alphabet (the conventional characters of the alphabet used to represent speech)
Holonyms ("O" is a member of...):
Latin alphabet; Roman alphabet (the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe)
Sense 3
Meaning:
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
Synonyms:
Classified under:
Hypernyms ("O" is a kind of...):
chemical element; element (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)
gas (a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely)
Hyponyms (each of the following is a kind of "O"):
liquid oxygen; LOX (a bluish translucent magnetic liquid obtained by compressing gaseous oxygen and then cooling it below its boiling point; used as an oxidizer in rocket propellants)
Holonyms ("O" is a substance of...):
air (a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of)
H2O; water (binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent)
ozone (a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation))
Context examples:
On her return, at about nine o’clock, she met a man who asked her if she had seen anything of the child who was lost.
(Frankenstein, by Mary Wollstonecraft Shelley)
However, I was in time for the last train to Eyford, and I reached the little dim-lit station after eleven o’clock.
(The Adventures of Sherlock Holmes, by Sir Arthur Conan Doyle)
What does he do to Mobits? I will tell you, O White Man. He has a house. He puts Mobits in that house.
(Love of Life and Other Stories, by Jack London)
And it did; for we returned at one o’clock, rested and strengthened by a hearty dinner.
(The Sea-Wolf, by Jack London)
At five o'clock the two ladies retired to dress, and at half-past six Elizabeth was summoned to dinner.
(Pride and Prejudice, by Jane Austen)
No one wanted to go to bed when at ten o'clock Mrs. March put by the last finished job, and said, "Come girls."
(Little Women, by Louisa May Alcott)
An water-in-oil (w/o) emulsion with immunomoadjuvant activity.
(Montanide ISA 51 VG, NCI Thesaurus)
“See now, Jem, none o’ that!” said Berks, sulkily.
(Rodney Stone, by Sir Arthur Conan Doyle)
I have not seen him since seven o'clock.
(Persuasion, by Jane Austen)
At two o’clock the raven could be seen approaching, and this time her coachman and everything about her, as well as her horses, were black.
(Fairy Tales, by The Brothers Grimm)
