SAFETY TUBE
\sˈe͡ɪfti tjˈuːb], \sˈeɪfti tjˈuːb], \s_ˈeɪ_f_t_i t_j_ˈuː_b]\
Definitions of SAFETY TUBE
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By Willam Alexander Newman Dorland
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A small part of the upper portion of the eustachian t. which lies in the curve formed by the cartilage as it turns forward under the cartilaginous hook. It is always sufficiently open to allow a recoil of air to occur from the drum cavity if the drumhead is suddenly driven in, as in explosions, and also to permit of a slow equalization of pressure in the tympanic cavity from the pharynx.
By Smith Ely Jelliffe
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