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n.1.(Zool.) A median elevation behind the mouth in the arthropods.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Once the current intensity, best suitable for maximum venom yield was achieved, current of that intensity was applied at various body parts (i.e., cephalothorax, metastoma, joints between metasoma and the base of telson) of each scorpion species, to determine the best site for current application for venom extraction.
Quantity of venom obtained was also high when current was applied at joints between metastoma. Base of telson was best because this site is nearest to the venom gland and thin chitenous covering at joints made that site more sensitive.