233 Unc 



Tympana. — The drums ; two deep cavities on 

 each side of the epigastrium, which are the 

 instruments of sound. (Gr. tympanon, from 

 tyfto, to strike.) 



Tympanal. — Pertaining to the tympanum, (Gr. 

 tympanon.) 



Tympanal nervi. — The receiving nucleus of the 

 nerve-fibres from the nerve-cells connected with 

 the groups of elongate rods situated above the 

 drum, and stretched across within the limb. 

 (Gr, tympanon, and L, nervi.) 



Ulnar nervure.^ — A radiating or cross nervure in the 

 wing. (L. ulna, and nervus.) 



Umber. — Brown, dark with yellow, {Umbria, in 

 Italy, where the ore of iron of this name is 

 mined.) 



Umbones. — Two movable thorns situated on the 

 prothorax in Acrocinus longlmanus. (L. xnnho, 

 anything that projects.) 



Unbra. — A shadow ; a slight shade of colour upon 

 a paler ground, when not easily distinguished. 

 (L, a shadow.) 



Un-. — A Saxon prefix signifying not before nouns 

 or adjectives, and the reversal of its action 

 before verbs. 



Unciform. — Hook-shaped ; having the form of a 

 hook. fL, uncus, a hook, and forma.) 



Uncinate. — Hooked at the end. (L, unots.) 



