[1] : The Collaborative International Dictionary of English v.0.48

almond \alm"ond\ aum"mu^nd, n. oe. almande, almaunde,
   alemaunde, f. amande, l. amygdala, fr. gr. 'amygda`lh: cf.
   sp. almendra. cf. amygdalate.
   1. the fruit of the almond tree.
      1913 webster

   note: the different kinds, as bitter, sweet, thin-shelled,
         thick-shelled almonds, and jordan almonds, are the
         products of different varieties of the one species,
         amygdalus communis, a native of the mediterranean
         region and western asia.
         1913 webster

   2. the tree that bears the fruit; almond tree.
      1913 webster

   3. anything shaped like an almond. specifically: anat. one
      of the tonsils.
      1913 webster

   almond oil, fixed oil expressed from sweet or bitter
      almonds.

   oil of bitter almonds, a poisonous volatile oil obtained
      from bitter almonds by maceration and distillation;
      benzoic aldehyde.

   imitation oil of bitter almonds, nitrobenzene.

   almond tree bot., the tree bearing the almond.

   almond willow bot., a willow which has leaves that are of
      a light green on both sides; almond-leaved willow salix
      amygdalina. --shenstone.
      1913 webster
see also:
amygdalate amygdalus communis almond oil oil of bitter almonds imitation oil of bitter almonds almond tree 
almond willow salix amygdalina 

[2] : The Collaborative International Dictionary of English v.0.48

essential \essen"tial\ e^sse^n"sjal, a. cf. f.
   essentiel. see essence.
   1. belonging to the essence, or that which makes an object,
      or class of objects, what it is.
      1913 webster

            majestic as the voice sometimes became, there was
            forever in it an essential character of
            plaintiveness.                        --hawthorne.
      1913 webster

   2. hence, really existing; existent.
      1913 webster

            is it true, that thou art but a name,
            and no essential thing?               --webster
                                                  1623.
      1913 webster

   3. important in the highest degree; indispensable to the
      attainment of an object; indispensably necessary.
      1913 webster

            judgment's more essential to a general
            than courage.                         --denham.
      1913 webster

            how to live? -- that is the essential question for
            us.                                   --h. spencer.
      1913 webster

   4. containing the essence or characteristic portion of a
      substance, as of a plant; highly rectified; pure; hence,
      unmixed; as, an essential oil. "mine own essential
      horror." --ford.
      1913 webster

   5. mus. necessary; indispensable; -- said of those tones
      which constitute a chord, in distinction from ornamental
      or passing tones.
      1913 webster

   6. med. idiopathic; independent of other diseases.
      1913 webster

   essential character biol., the prominent characteristics
      which serve to distinguish one genus, species, etc., from
      another.

   essential disease, essential fever med., one that is
      not dependent on another.

   essential oils chem., a class of volatile oils, extracted
      from plants, fruits, or flowers, having each its
      characteristic odor, and hot burning taste. they are used
      in essences, perfumery, etc., and include many varieties
      of compounds; as lemon oil is a terpene, oil of bitter
      almonds an aldehyde, oil of wintergreen an ethereal
      salt, etc.; -- called also volatile oils in distinction
      from the fixed or nonvolatile.
      1913 webster
see also:
essence essential character essential disease essential fever essential oils lemon oil 
oil of bitter almonds oil of wintergreen volatile oils 

Almonds >> A Words
Almonds, definition of term: Almonds
almonds_pag1.html

Bitter >> B Words
Bitter, definition of term: Bitter
bitter_pag1.html

Bitter Vetch >> B Words
Bitter Vetch, definition of term: Bitter Vetch
bitter+vetch_pag1.html

Bitter Spar >> B Words
Bitter Spar, definition of term: Bitter Spar
bitter+spar_pag1.html

Bitter Betch >> B Words
Bitter Betch, definition of term: Bitter Betch
bitter+betch_pag1.html

Baby Oil >> B Words
Baby Oil, definition of term: Baby Oil
baby+oil_pag1.html

Banana Oil >> B Words
Banana Oil, definition of term: Banana Oil
banana+oil_pag1.html