before a vowel sometimes tympan-, combining form repr. Gr. τύμπανον or L. TYMPANUM, in recent terms of anatomy, etc. Tympanectomy [Gr. ἐκτομή excision], excision of the tympanic membrane. Tympanocervical a. [CERVICAL], affecting the tympanum and the neck. Tympano-Eustachian a., constituted by the tympanum and the Eustachian tube. Tympanohyal a., pertaining to the tympanum and the hyoid arch; epithet of a small bone or cartilage at the base of the styloid process, which in early life becomes fused with the temporal bone; sb. = t. bone or cartilage. Tympanomalleal a., pertaining to the tympanic bone and the malleus; applied to a bone in the skull of batrachians and fishes. Tympanomandibular a., pertaining to the tympanum, or the tympanic bone, and the mandible or lower jaw-bone. Tympanomastoid a., pertaining to the tympanum and the mastoid cells. Tympano-occipital a. and sb., applied to a small bone or ossification connected with the ear and the exoccipital bone in birds, and held to be homologous with the tympanic bone in mammals (Cent. Dict., 1891). Tympanoperiotic a., consisting of the tympanic bone and periotic bones united; sb., a tympanoperiotic bone, as the ear-bone of a cetacean. Tympanophony [Gr. φωνή voice], a sensation of ringing in the ears (cf. TYMPANUM 2). Tympanosquamosal a., pertaining to the tympanic and the squamosal bones. Tympanostapedial a., ‘pertaining to the tympanum and the stapes’ (Dorland, Med. Dict., 1900–13). Tympanotemporal a., ‘pertaining to the tympanum and the region over the temporal bone’ (ibid.). Tympanotomy [Gr. τομή cutting], incision through the tympanic membrane.
1900–13. Dorland, Med. Dict., *Tympanectomy. Ibid., s.v. Abscess, *Tympanocervical a[bscess], an abscess arising in the tympanum and extending to the neck.
1890. Billings, Med. Dict., *Tympano-Eustachian passage, the tympanum and Eustachian tube considered together as a branchial cleft.
1872. Mivart, Elem. Anat., 81. The styloid process … is at birth separate from a little cylindrical piece of bone which afterwards forms its root, and which is called the *tympano-hyal. Ibid. (1881), Cat, 78. At the end of the stylo-hyal is a cylindrical cartilage, the tympano-hyal.
1891. Cent. Dict., *Tympanomalleal.
1900–13. in Dorland, Med. Dict.
a. 1909. Starks, Synon. Fish Skeleton, 513 (Cent. D. Supp.).
1891. Cent. Dict., *Tympanomandibular.
c. 1900. Buck’s Handbk. Med. Sci., III. 697 (Cent. D. Supp.), *Tympanomastoid.
1870. Rolleston, Anim. Life, 8. A lamina of bone, which … serves … to keep the *tympano-periotic … in place.
1871. Huxley, Anat. Vert. Anim., viii. 405. When the tympano-periotic bone and all the facial bones are removed.
1899. Syd. Soc. Lex., *Tympanophony, abnormal sounds in the ear, as echoes, &c.
1891. Cent. Dict., *Tympanosquamosal.
c. 1900. Buck’s Handbk. Med. Sci., III. 672 (Cent. D. Supp.), *Tympanotomy.
