Defn: Half of a circumference.

SEMICIRQUE
Sem"i*cirque, n.

Defn: A semicircular hollow or opening among trees or hills.
Wordsworth.

SEMICOLON
Sem"i*co`lon, n.

Defn: The punctuation mark [;] indicating a separation between parts or members of a sentence more distinct than that marked by a comma.

SEMICOLUMN
Sem"i*col`umn, n.

Defn: A half column; a column bisected longitudinally, or along its axis.

SEMICOLUMNAR
Sem`i*co*lum"nar, a.

Defn: Like a semicolumn; flat on one side and round on the other; imperfectly columnar.

SEMICOMPACT
Sem`i*com*pact", a.