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(botany) The stalk supporting an inflorescence or a solitary flower/fruit.
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(botany) A short stalk at the base of a reproductive structure of a non-flowering plant.
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(anatomy) A bundle of neurons connecting different parts of the brain.
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(anatomy) In arthropods, the base segments of an antenna or stalk-like structures such as the peduncles of some barnacles
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(anatomy) In vertebrates, the base of any relatively massive anatomical member connected to the body by a narrower section. Cf. caudal peduncle of fishes.
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(anatomy) A stem attaching a mass of tissue (such as a polyp) to the body.
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(zoology) A collection of nerves in the appendage of an animal (such as the tip of a dolphin's tail).