The Collaborative International Dictionary of English v.0.48:

Schooner \Schoon"er\, n. [See the Note below. Cf. Shun.]
   (Naut.)
   Originally, a small, sharp-built vessel, with two masts and
   fore-and-aft rig. Sometimes it carried square topsails on one
   or both masts and was called a topsail schooner. About
   1840, longer vessels with three masts, fore-and-aft rigged,
   came into use, and since that time vessels with four masts
   and even with six masts, so rigged, are built. Schooners with
   more than two masts are designated three-masted schooners,
   four-masted schooners, etc. See Illustration in Appendix.
   [1913 Webster]

   Note: The first schooner ever constructed is said to have
         been built in Gloucester, Massachusetts, about the year
         1713, by a Captain Andrew Robinson, and to have
         received its name from the following trivial
         circumstance: When the vessel went off the stocks into
         the water, a bystander cried out,"O, how she scoons!"
         Robinson replied, " A scooner let her be;" and, from
         that time, vessels thus masted and rigged have gone by
         this name. The word scoon is popularly used in some
         parts of New England to denote the act of making stones
         skip along the surface of water. The Scottish scon
         means the same thing. Both words are probably allied to
         the Icel. skunda, skynda, to make haste, hurry, AS.
         scunian to avoid, shun, Prov. E. scun. In the New
         England records, the word appears to have been
         originally written scooner. Babson, in his "History of
         Gloucester," gives the following extract from a letter
         written in that place Sept. 25, 1721, by Dr. Moses
         Prince, brother of the Rev. Thomas Prince, the annalist
         of New England: "This gentleman (Captain Robinson) was
         first contriver of schooners, and built the first of
         that sort about eight years since."
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Topsail \Top"sail`\, n. (Naut.)
   In a square-rigged vessel, the sail next above the lowermost
   sail on a mast. This sail is the one most frequently reefed
   or furled in working the ship. In a fore-and-aft rigged
   vessel, the sail set upon and above the gaff. See Cutter,
   Schooner, Sail, and Ship.
   [1913 Webster]

   Topsail schooner. (Naut.) See Schooner, and Illustration
      in Appendix.
      [1913 Webster]