tympanic sulcus मीनिंग इन हिंदी

Its inner end is closed, by the tympanic membrane which originates from the tympanic sulcus; the upper limit of its outer orifice is formed by the posterior root of the zygomatic process, immediately below which there is sometimes seen a small spine, the " suprameatal spine ", situated at the upper and posterior part of the orifice.