hypoderma

from The Century Dictionary.

• noun In botany, the layer of colorless cells just beneath the epidermis of a leaf; also extended to the external cortex under the epidermis of a stem: introduced in the first sense by Kraus (1865). It is most commonly collenchyma. Also hypoderm.
• noun [capitalized] A genus of hypodermic dipterous insects, or botflies, of the family Œstridæ, species of which live under the skin of various ruminant and other hoofed quadrupeds. H. bovis is the bot-fly of the ox. A related species, H. linearis, is known in Texas as the heel-fly, from attacking the heels of cattle.
• noun [capitalized] A genus of chiropterous mammals, or bats.
• noun A genus of ascomycetous fungi, type of the family Hypodermataceæ, having the ascocarps elongate and opening by a longitudinal slit.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) 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.
• noun (Zoöl.) An inner cellular layer which lies beneath the chitinous cuticle of arthropods, annelids, and some other invertebrates.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun botany A layer of tissue beneath the epidermis in plants, performing the physiological function of strengthening the epidermal tissue. In phanerogamous plants it is developed as collenchyma.
• noun zoology An inner cellular layer which lies beneath the chitinous cuticle of arthropods, annelids, and some other invertebrates.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun in some classifications considered the type genus of the family Hypodermatidae: warble flies