ra·chil·la 
(rə-kĭlə)
(rə-kĭlə)n. pl. ra·chil·lae (-kĭlē)
The axis of a spikelet of a grass or sedge.
[New Latin, diminutive of RACHIS.]
- constrictively
- constrictive pericarditis
- constrictor
- constringe
- constringency
- constringent
- construal
- construct
- constructer
- constructible
- construction
- constructional
- constructionally
- constructionist
- construction paper
- constructive
- constructive interference
- constructively
- constructiveness
- constructivism
- constructivist
- constructor
- construe
- consubstantial
- consubstantiate