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  • Webster's Revised Unabridged Dictionary
    • a Digastric (Anat) Having two bellies; biventral; -- applied to muscles which are fleshy at each end and have a tendon in the middle, and esp. to the muscle which pulls down the lower jaw.
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Century Dictionary and Cyclopedia
    • digastric In anatomy: Having two fleshy bellies with an intervening tendinous part, as a muscle: as, the omo hyoid, the biventer cervicis, etc., are digastric muscles
    • digastric Pertaining to the digastric.
    • digastric The digastric groove.
    • n digastric A muscle of the lower jaw: so called because in man it has two bellies. In its generalized condition it is a principal depressor of the lower jaw, opening the mouth and antagonizing the temporal and masseteric muscles. It arises from the back part of the skull, and is inserted into the mandible. In man and many other animals (though not in most) it becomes digastric or double-bellied, the intervening tendon being bound by an aponeurotic loop to the hyoid bone, and the muscle thus becoming an elevator of the hyoid as well as a depressor of the jaw. It arises from the digastric groove of the mastoid, and is inserted into the symphysis menti. With the lower border of the jaw its two bellies, which meet at an angle, bound the surgical triangle of the neck known as the submaxillary space.
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Chambers's Twentieth Century Dictionary
    • adj Digastric dī-gas′trik double-bellied, or fleshy at each end, as is one of the muscles of the lower jaw.
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Webster's Revised Unabridged Dictionary
Gr. di- = di`s- twice + belly: cf. F. digastrique,
Chambers's Twentieth Century Dictionary
Gr. di-, double, gastēr, the belly.