che·lic·er·a 
(kĭ-lĭsər-ə)
(kĭ-lĭsər-ə)n. pl. che·lic·er·ae (-ə-rē′)
Either of the first pair of fanglike appendages near the mouth of an arachnid or a horseshoe crab, often modified for grasping and piercing.
[New Latin : CHELA + Greek keras, horn; see ker-1 in the Appendix of Indo-European roots.]