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}.

Phosphorus \Phos"phor*us\, n.; pl. {Phosphori}. [L., the morning
   star, Gr. ?, lit., light bringer; ? light + ? to bring.]
   1. The morning star; Phosphor.

   2. (Chem.) A poisonous nonmetallic element of the nitrogen
      group, obtained as a white, or yellowish, translucent waxy
      substance, having a characteristic disagreeable smell. It
      is very active chemically, must be preserved under water,
      and unites with oxygen even at ordinary temperatures,
      giving a faint glow, -- whence its name. It always occurs
      compined, usually in phosphates, as in the mineral
      apatite, in bones, etc. It is used in the composition on
      the tips of friction matches, and for many other purposes.
      The molecule contains four atoms. Symbol P. Atomic weight
      31.0.

   3. (Chem.) Hence, any substance which shines in the dark like
      phosphorus, as certain phosphorescent bodies.

   {Bologna phosphorus} (Chem.), sulphide of barium, which
      shines in the dark after exposure to light; -- so called
      because this property was discovered by a resident of
      Bologna. The term is sometimes applied to other compounds
      having similar properties.

   {Metallic phosphorus} (Chem.), an allotropic modification of
      phosphorus, obtained as a gray metallic crystalline
      substance, having very inert chemical properties. It is
      obtained by heating ordinary phosphorus in a closed vessel
      at a high temperature.

   {Phosphorus disease} (Med.), a disease common among workers
      in phosphorus, giving rise to necrosis of the jawbone, and
      other symptoms.

   {Red, or Amorphous}, {phosphorus} (Chem.), an allotropic
      modification of phosphorus, obtained as a dark red powder
      by heating ordinary phosphorus in closed vessels. It is
      not poisonous, is not phosphorescent, and is only
      moderately active chemically. It is valuable as a chemical
      reagent, and is used in the composition of the friction
      surface on which safety matches are ignited.

   {Solar phosphori} (Chem.), phosphorescent substances which
      shine in the dark after exposure to the sunlight or other
      intense light.