chelae is chela's Plural Form

chela

US 
UK 
  • n.(蟹,虾等的)螯;钳爪;倒钩骨;门徒
Plural Form:chelae  
n.
1.
(蟹,虾等的)螯;钳爪;倒钩骨
2.
〈外〉学徒,门徒;(学道的)徒弟