If there is a word or phrase you think we have missed out, or if you disagree with a definition, please let us know.
A
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B
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C
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D
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E
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F
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G
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H
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I
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J
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K
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L
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M
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N
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O
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P
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Q
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R
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S
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T
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U
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V
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W
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X
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Y
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Z
- Full List
O
Obesity
Abnormally overweight
Oestrogen
A steroid hormone that controls female sexual development
Oral
Relating to or situated near the mouth
Oral sex
Sex which relates or is situated near to the mouth
Orchitis
Inflammation of the testis
Orgasm
The climax of sexual excitement
Ovarian
Relating to the female reproduction organs, the ovaries