Examlex
The supply curve of the firm in perfect competition is that portion of the marginal cost curve above the average variable cost curve.
Empty-nest Syndrome
A feeling of grief and loneliness parents may feel when their children leave home for the first time, such as to live on their own or attend college.
Concrete Operational Stage
A phase in Piaget's theory of cognitive development (ages 7-12), where children gain a better understanding of mental operations and can think logically about concrete events.
Abstract Ideas
Concepts that are not tangible or concrete, often involving complex thought processes, theories, or philosophical notions.
Inanimate Objects
Objects that lack life or consciousness, typically referring to items that are not alive.
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