Source : Webster's Revised Unabridged Dictionary (1913)

   {Solar month}. See under {Month}.

   {Solar oil}, a paraffin oil used an illuminant and lubricant.
      

   {Solar phosphori} (Physics), certain substances, as the
      diamond, siulphide of barium (Bolognese or Bologna
      phosphorus), calcium sulphide, etc., which become
      phosphorescent, and shine in the dark, after exposure to
      sunlight or other intense light.

   {Solar plexus} (Anat.), a nervous plexus situated in the
      dorsal and anterior part of the abdomen, consisting of
      several sympathetic ganglia with connecting and radiating
      nerve fibers; -- so called in allusion to the radiating
      nerve fibers.

   {Solar spots}. See {Sun spots}, under {Sun}.

   {Solar system} (Astron.), the sun, with the group of
      celestial bodies which, held by its attraction, revolve
      round it. The system comprises the major planets, with
      their satellites; the minor planets, or asteroids, and the
      comets; also, the meteorids, the matter that furnishes the
      zodiacal light, and the rings of Saturn. The satellites
      that revolve about the major planets are twenty-two in
      number, of which the Earth has one (see {Moon}.), Mars
      two, Jupiter five, Saturn nine, Uranus four, and Neptune
      one. The asteroids, between Mars and Jupiter, thus far
      discovered (1900), number about five hundred, the first
      four of which were found near the beginning of the
      century, and are called Ceres, Pallas, Juno, and Vesta.

   Note: The principal elements of the major planets, and of the
         comets seen at more than one perihelion passage, are
         exhibited in the following tables: -- I. -- Major
         Planets. Symbol.Name.Mean distance -- that of the Earth
         being unity.Period in days.Eccentricity.Inclination of
         orbit.Diameter in miles ????????????????????? II. --
         Periodic Comets. Name.Greatest distance from sun.Least
         distance from sun.Inclination of orbit.Perihelion
         passage. [deg] [min] 54 Encke's3.314.100.34212 541885.2
         ?????????????????????

   {Solar telegraph}, telegraph for signaling by flashes of
      reflected sunlight.

   {Solar time}. See {Apparent time}, under {Time}.

Source : WordNet®

solar plexus
     n : a large plexus of sympathetic nerves in the abdomen behind
         the stomach [syn: {coeliac plexus}, {plexus celiacus}, {abdominal
         nerve plexus}]