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n. pl. teg·mi·na (-mə-nə)
A covering or integument, especially:
a. The thin plate of bone that covers the middle ear.
b. The tough leathery forewing of certain insects.
c. The inner layer of a seed coat.

[Latin tegimen, tegmen, covering, from tegere, to cover; see (s)teg- in Indo-European roots.]


n, pl -mina (-mɪnə)
1. (Zoology) either of the leathery forewings of the cockroach and related insects
2. (Botany) the delicate inner covering of a seed
3. (Botany) any similar covering or layer
[C19: from Latin: a cover, variant of tegimen, from tegere to cover]
ˈtegminal adj


(ˈtɛg mən)

n., pl. -mi•na (-mə nə)
1. a covering or integument, esp. of a plant or animal.
2. the delicate inner coat of a seed.
3. either of a pair of leathery forewings extending over the hind wings in certain insects.
[1800–10; < Latin: covering (also tegumen, tegimen) =teg(ere) to cover + -men n. suffix]
teg′mi•nal, adj.
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References in periodicals archive ?
Radiological signs indicating cholesteatoma in the attic included erosion or destruction of scutum or spur (the lateral wall of the attic), widening of the aditus ad antrum (loss of figure of "8" appearance) , antral wall erosions and widening , ossicular erosions and destruction , medial attic wall erosion which may lead to facial nerve canal involvement, which may cause paresis or paralysis , erosion of the lateral semicircular canal which may result into fistula formation (Figure 1), dehiscence of tegmen tympani , dehiscence of sigmoid sinus plate, erosion of the external auditory canal (EAC), and automastoidectomy.
12] Other areas of erosion include the tegmen tympani, the bony plate covering the sigmoid sinus, the squama of the temporal bone and rarely the vestibular labyrinth.
The exact anatomical location of the disease process, erosion of the bony boundaries of the middle ear, the status of the ossicular chain, tegmen tympani, sigmoid sinus plate and lateral semicircular canals can be well visualized.
The scutum, ossicles, and tegmen tympani are common sites for erosion.
Other cases have no connection to the CNS; instead, the connection may be provided by a small congenital defect in the tegmen tympani or overlying temporal bone.
Preoperative CT establishes the type of surgical procedure as it determines the extent of the cholesteatoma, ocular chain involvement, facial canal integrity, and tegmen tympani and dural plate involvement.
A small defect of 3mm size in the anterior aspect of tegmen tympani with contrast leak in to left middle ear cavity and mastoid air cells with opacification of cotton swab kept in left external ear--Findings are suggestive of CSF otorrhoea.
Tegmen tympani or sinus plate erosions warrants the radiologist to find intracranial complications if any.
3-cm abscess at the left temporal lobe (figure 2) and a breach of the tegmen tympani.
INTRODUCTION: In the well-pneumatized temporal bone, the temporal lobe of the brain is separated from the middle ear and the mastoid process by a thin layer of bone known as the tegmen tympani.
Computed tomography showed a large, hyperdense dura-based mass along the left temporal bone invading the mastoid antrum, with destruction of the tegmen tympani.
Otorhino-liquorrhoea results from disruption of dura in tegmen tympani region.