What is (a) The entire central axis of a feather. (b) The basal portion of the body of one of the Pennatulacea, or of a gorgonian called?

stem — (Zoöl.) (a) The entire central axis of a feather. (b) The basal portion of the body of one of the Pennatulacea, or of a gorgonian. (Webster's 1913.)

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