Category: O
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Object choice
In the psychology of sex, the type of person or thing selected as a focus for sexual activity.
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Obituary notice
A biographical sketch that appears in a newspaper or on the Internet shortly after a person’s death.
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Obedience
A change in belief or behavior as a result of pressure from an authority figure.
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Otorhinolaryngology (Ent)
An acronym for otorhinolaryngology. A medical specialty concerned with the totality of the ear, nose, and throat. The study of the ear, nose and throat. Branch of medicine focused on the function and treatment of ear, nose, and larynx disorders. The medical specialty dealing with the ears (-oto), nose (-rhino), and throat (-laryngo), hence the…
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Oxymel
An extraction made by steeping herbs in vinegar and honey.
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Organic matter
Matenal derived from things that were once alive, such as manure and compost, and which breaks down to form humus. The addition of organic matter improves the structure and fertility of any soil. Material derived from things that were once alive, such as manure and compost, and which breaks down to form humus. The addition…
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Ozone
A highly reactive modification of oxygen whereby the two oxygen atoms in oxygen (02) are increased to three (03). A form of oxygen consisting of molecules of three oxygen atoms (03), as compared with atmospheric oxygen with two oxygen atoms (CL). Toxic gas containing three atoms of oxygen per molecule (not the usual two) found…
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Oval leaf
A leaf broadest in the middle and about twice as long as broad.
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Ovate leaf
A leaf with its broadest part above the middle, tapering suddenly to its± blunt tip, and more gradually to its base. A leaf± egg-shaped in outline, broadest at the base and about twice as long as broad. Oval in shape.
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Oblong leaf
A leaf about twice or three times as long as broad, and parallel-sided at least in the central part of the leaf-blade.