Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


 (hī′pə-dûr′mĭs) also hy·po·derm (hī′pə-dûrm′)
1. An epidermal layer of cells that secretes an overlying chitinous cuticle, as in arthropods.
2. Botany A layer of cells lying immediately below the epidermis.
3. Anatomy A subcutaneous layer of loose connective tissue containing a varying number of fat cells.


(ˌhaɪpəˈdɜːmɪs) ,




1. (Botany) botany a layer of thick-walled supportive or water-storing cells beneath the epidermis in some plants
2. (Zoology) zoology the epidermis of arthropods, annelids, etc, which secretes and is covered by a cuticle
[C19: from hypo- + epidermis]


(ˌhaɪ pəˈdɜr mɪs)

1. an underlayer of epithelial cells in arthropods and certain other invertebrates that secretes the overlying cuticle or exoskeleton.
2. Bot. a tissue or layer of cells beneath the epidermis.
[1865–70; hypo- + (epi)dermis]
hy`po•der′mal, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hypodermis - layer of cells that secretes the chitinous cuticle in e.g. arthropods
layer - thin structure composed of a single thickness of cells
body covering - any covering for the body or a body part
References in periodicals archive ?
11] The skin consists of epidermis, dermis, and hypodermis.
EGL-15B protein was mainly expressed in the hypodermis and neurons in the wild-type background, whereas EGL-15A protein was mainly expressed in muscle cells.
chilensis is anatomically distinct because of its 3-to-4-cell layers-deep adaxial hypodermis, larger vascular bundles attached to both leaf surfaces by fiber girders, adaxial girders and often massive and non-vascular fiber bundles (Tomlinson et al.
The topical application can benefit the outer layer (the epidermis), but oral use of MSM helps maintain the skin's longterm health by supporting the underlying dermis and hypodermis layers," he added.
The stomata on cycad leaves are primarily located on the abaxial surface in sunken pits, and the epidermis, which is underlain by one or more layers of thick-walled hypodermis cells, is typically coated with a thick cuticle (Vorster, 2004).
This characteristic is considered an extremely important factor for the seedlings that will be transferred to the acclimatization since the presence of hypodermis with periclinal cell elongation provides greater concentration or water reserve, fundamental processes to eliminate hydric stress in ex vitro plantlets.
It exerts multiple vital protective functions against environmental aggressions, rendered possible due to an elaborate structure, associating various tissues of ectodermal and mesodermal origin, arranged in three layers, including (from top to bottom) the epidermis (and its appendages), the dermis, and the hypodermis.
Essential oil is located in the hypodermis in large thin-walled cells at the periphery of roots and rhizomes.
According to anatomy distribution, WAT is subcategorized as visceral and subcutaneous fat tissue [5]; the former is located within the muscle walls of the abdomen covering internal organs, whereas the latter is located under the skin, specifically in the hypodermis [6].
Superficial dermal edema gives rise to wheals, while edema in the deep dermis, hypodermis and gastrointestinal tract results in angioedema.
The anthocyanins are located in the vacuoles of cells in the hypodermis of skins (rarely in the pulp).
The system targets microwave energy at the interface between the dermis and the hypodermis, "and we hypothesized that heat at this level in the skin may also have an important effect on the hair bulb," he said.