hypoderma

Hyp`o*der"ma, n. Etym: [NL. See Hypo, and derma.] 1. (Bot.) Defn: A layer of tissue beneath the epidermis in plants, and performing the physiological function of strengthening the epidermal tissue. In phanerogamous plants it is developed as collenchyma. 2. (Zoöl.) Defn: An inner cellular layer which lies beneath the chitinous cuticle of arthropods, annelids, and some other invertebrates.

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