dot·tle 
(dŏtl)
(dŏtl)n.
The plug of tobacco ash left in the bowl of a pipe after it has been smoked.
[From DOT1, lump (obsolete).]
- cosmic microwave background radiation
- cosmic noise
- cosmic ray
- cosmic ray air shower
- cosmic string
- cosmid
- cosmo
- cosmo-
- cosmochemical
- cosmochemist
- cosmochemistry
- cosmogenic
- cosmogonic
- cosmogonical
- cosmogonically
- cosmogonist
- cosmogony
- cosmographer
- cosmographic
- cosmographical
- cosmographically
- cosmography
- cosmologic
- cosmological
- cosmological constant