rick·rack 
(rĭkrăk′)
(rĭkrăk′)n.
A flat narrow braid woven in zigzag form, used as a trimming for clothing or curtains.
[Reduplication of RACK1.]
- microfiche
- microfilament
- microfilamentous
- microfilaria
- microfilarial
- microfilm
- microform
- microfossil
- microgamete
- microgametophyte
- microglia
- microglial
- microglossia
- microgram
- micrograph
- micrographic
- microgravity
- microgreens
- microhabitat
- microinject
- microinjection
- microinstruction
- microlending
- microlith
- microlithic