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Word: essential (lookup usage) (lookup stats)


Meaning:

Adjective:

  • Necessary.
  • Being in the basic form; showing its essence.
  • of a lamination of a 3-manifold Such that each complementary region is irreducible, the boundary of each complementary region is incompressible by disks and monogons in the complementary region, and no leaf is a sphere or a torus bounding a solid torus in the manifold.
  • Very important; of high importance.

Source: Wiktionary | Src Info »

Noun:

  • A fundamental ingredient.
  • A necessary ingredient.

Source: Wiktionary | Src Info »