Animal Info - Glossary O

Obligate
Required.
Oestrus cycle
See estrus cycle.
Omnivorous
Referring to an animal that eats both plant and animal life.
Order
One of the categories of taxonomy by which animals are hierarchically classified. It ranks above "family" and below "class".
Organochlorines
Chlorinated hydrocarbon pesticides, such as aldrin, dieldrin, or DDT).
Overstory
1. The forest canopy layer above the shrubs, herbs and small trees in a forest. 2. The upper level of vegetation in a two-level vegetation system (see understory).
Ovulation - induced
Ovulation that is triggered by copulation.

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Last modified: March 19, 2006;

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