The Collaborative International Dictionary of English v.0.48:

Monosaccharide \Mon`o*sac"cha*ride\, n. Also -rid \-rid\ .
   [Mono- + saccharide.] (Chem.)
   A simple sugar; any of a number of sugars (including the
   trioses, tetroses, pentoses, hexoses, etc.), not decomposable
   into simpler sugars by hydrolysis. Specif., as used by some,
   a hexose. The monosaccharides are all open-chain compounds
   containing hydroxyl groups and either an aldehyde group or a
   ketone group.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Rid \Rid\,
   imp. & p. p. of Ride, v. i. [Archaic]
   [1913 Webster]

         He rid to the end of the village, where he alighted.
                                                  --Thackeray.
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The Collaborative International Dictionary of English v.0.48:

Rid \Rid\, v. t. [imp. & p. p. Rid or Ridded; p. pr. & vb.
   n. Ridding.] [OE. ridden, redden, AS. hreddan to deliver,
   liberate; akin to D. & LG. redden, G. retten, Dan. redde, Sw.
   r[aum]dda, and perhaps to Skr. ?rath to loosen.]
   1. To save; to rescue; to deliver; -- with out of. [Obs.]
      [1913 Webster]

            Deliver the poor and needy; rid them out of the hand
            of the wicked.                        --Ps. lxxxii.
                                                  4.
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   2. To free; to clear; to disencumber; -- followed by of. "Rid
      all the sea of pirates." --Shak.
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            In never ridded myself of an overmastering and
            brooding sense of some great calamity traveling
            toward me.                            --De Quincey.
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   3. To drive away; to remove by effort or violence; to make
      away with; to destroy. [Obs.]
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            I will red evil beasts out of the land. --Lev. xxvi.
                                                  6.
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            Death's men, you have rid this sweet young prince!
                                                  --Shak.
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   4. To get over; to dispose of; to dispatch; to finish. [R.]
      "Willingness rids way." --Shak.
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            Mirth will make us rid ground faster than if thieves
            were at our tails.                    --J. Webster.
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   To be rid of, to be free or delivered from.

   To get rid of, to get deliverance from; to free one's self
      from.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ride \Ride\, v. i. [imp. Rode (r[=o]d) (Rid [r[i^]d],
   archaic); p. p. Ridden(Rid, archaic); p. pr. & vb. n.
   Riding.] [AS. r[imac]dan; akin to LG. riden, D. rijden, G.
   reiten, OHG. r[imac]tan, Icel. r[imac][eth]a, Sw. rida, Dan.
   ride; cf. L. raeda a carriage, which is from a Celtic word.
   Cf. Road.]
   1. To be carried on the back of an animal, as a horse.
      [1913 Webster]

            To-morrow, when ye riden by the way.  --Chaucer.
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            Let your master ride on before, and do you gallop
            after him.                            --Swift.
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   2. To be borne in a carriage; as, to ride in a coach, in a
      car, and the like. See Synonym, below.
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            The richest inhabitants exhibited their wealth, not
            by riding in gilden carriages, but by walking the
            streets with trains of servants.      --Macaulay.
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   3. To be borne or in a fluid; to float; to lie.
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            Men once walked where ships at anchor ride.
                                                  --Dryden.
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   4. To be supported in motion; to rest.
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            Strong as the exletree
            On which heaven rides.                --Shak.
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            On whose foolish honesty
            My practices ride easy!               --Shak.
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   5. To manage a horse, as an equestrian.
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            He rode, he fenced, he moved with graceful ease.
                                                  --Dryden.
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   6. To support a rider, as a horse; to move under the saddle;
      as, a horse rides easy or hard, slow or fast.
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   To ride easy (Naut.), to lie at anchor without violent
      pitching or straining at the cables.

   To ride hard (Naut.), to pitch violently.

   To ride out.
      (a) To go upon a military expedition. [Obs.] --Chaucer.
      (b) To ride in the open air. [Colloq.]

   To ride to hounds, to ride behind, and near to, the hounds
      in hunting.
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   Syn: Drive.

   Usage: Ride, Drive. Ride originally meant (and is so used
          throughout the English Bible) to be carried on
          horseback or in a vehicle of any kind. At present in
          England, drive is the word applied in most cases to
          progress in a carriage; as, a drive around the park,
          etc.; while ride is appropriated to progress on a
          horse. Johnson seems to sanction this distinction by
          giving "to travel on horseback" as the leading sense
          of ride; though he adds "to travel in a vehicle" as a
          secondary sense. This latter use of the word still
          occurs to some extent; as, the queen rides to
          Parliament in her coach of state; to ride in an
          omnibus.
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                "Will you ride over or drive?" said Lord
                Willowby to his quest, after breakfast that
                morning.                          --W. Black.
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The Collaborative International Dictionary of English v.0.48:

Trisaccharide \Tri*sac"cha*ride\, n. Also -rid \-rid\ (Chem.)
   A complex sugar, as raffinose, yielding by hydrolysis three
   simple sugar molecules.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

rid
    v 1: relieve from; "Rid the house of pests" [syn: rid, free,
         disembarrass]