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open marriage

1. a marriage in which both partners allow and encourage each other to grow and change over the years. Compare closed marriage.

2. a marital arrangement (formal or common-law) in which the partners permit each other to have sexual relations with other people. See also nontraditional marriage.

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Psychology term of the day

May 9th 2024

node of Ranvier

node of Ranvier

any of successive regularly spaced gaps in the myelin sheath surrounding an axon. The gaps permit the exchange of ions across the plasma membrane at those points, allowing the nerve impulse to leap from one node to the next in so-called saltatory conduction along the axon. [Louis A. Ranvier (1835–1922), French pathologist]