In botany, a small cavity or chamber in certain plants, especially seaweeds, that contains reproductive organs.
From Medieval Latin conceptaculum, derived from concipere (to conceive, to contain), with the diminutive suffix -aculum meaning little container. The term developed in botanical taxonomy during the 17th-18th centuries.
Seaweed conceptacles are tiny factories—if you look at brown algae under a microscope, you'll see these little pockets that release sperm and eggs, essentially the ocean's version of flowers.
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