One of the mysteries of the English language finally explained.
1Botany and Mycology. The larger of the two types of spore produced by a heterosporous plant (now usually called megaspore).
2Biology. A large spore (usually the larger of two types of spore) produced by various protoctists.
Mid 19th century; earliest use found in Todd's Cyclopaedia of Anatomy and Physiology. From macro- + spore. Compare French macrospore.
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