from The Century Dictionary and Cyclopedia
- In ichthyology, situated above or upon, or forming the uppermost piece of, the tympanic pedicle which supports the mandible in fishes; hyomandibular.
- n. In ichthyology, the uppermost or proximal bone of the tympanomandibular or third cranial hemal arch in fishes, by means of which the lower jaw is suspended from the skull: so named by Owen, but now usually called the hyomandibular (which see). The term is correlated with hypotympanic, mesotympanic, and pretympanic.
- Situated upon or above the tympanum.
Sorry, no etymologies found.
The superior ligament of the malleus (lig. mallei superius) is a delicate, round bundle which descends from the roof of the epitympanic recess to the head of the malleus.
The short crus (crus breve; short process), somewhat conical in shape, projects almost horizontally backward, and is attached to the fossa incudis, in the lower and back part of the epitympanic recess.
The fossa incudis is a small depression in the lower and back part of the epitympanic recess; it lodges the short crus of the incus.
The tympanic cavity consists of two parts: the tympanic cavity proper, opposite the tympanic membrane, and the attic or epitympanic recess, above the level of the membrane; the latter contains the upper half of the malleus and the greater part of the incus.
The entrance to the antrum is a large irregular aperture, which leads backward from the epitympanic recess into a considerable air space, named the tympanic or mastoid antrum (see page 142).
It opens in front into that portion of the tympanic cavity which is known as the attic or epitympanic recess.