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primary rainbow

noun

the most commonly seen rainbow, formed by light rays that undergo a single internal reflection in a drop of water.

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Question 1 of 9
You may have read the word "simmer" in a recipe or two, but what does it really mean?
To cook in water that begins cold and then reaches a boil.
To stew in a sauce for a long time.
To cook in water, just below boiling temperature.
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Compare secondary rainbow.

Origin of primary rainbow

First recorded in 1785–95

Words nearby primary rainbow

primary processes, primary producer, primary pulmonary lobule, primary qualities, primary quality, primary rainbow, primary reaction, primary root, primary school, primary sex characteristic, primary spermatocyte
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020