(phonology) A rule that describes historical sound change (the change in pronunciation of a given sound or cluster of sounds) in the development of a language.

(lutherie) A wooden rod located inside the body of a violin-family instrument, close to the treble-side bridge foot.

plural of sounding rocket

(space science) A suborbital rocket used to launch upper atmosphere, exoatmospheric, and microgravity sondes or probes.

Synonym of Kartvelian

Synonym of Kartvelian

Synonym of Kartvelian

plural of south-southerly

(archaic) Clangula hyemalis, the long-tailed duck

(historical) South Sudan.