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The Collaborative International Dictionary
Equilibria

Equilibrium \E`qui*lib"ri*um\, n.; pl. E. Equilibriums, L. Equilibria. [L. aequilibrium, fr. aequilibris in equilibrium, level; aequus equal + libra balance. See Equal, and Librate.]

  1. Equality of weight or force; an equipoise or a state of rest produced by the mutual counteraction of two or more forces.

  2. A level position; a just poise or balance in respect to an object, so that it remains firm; equipoise; as, to preserve the equilibrium of the body.

    Health consists in the equilibrium between those two powers.
    --Arbuthnot.

  3. A balancing of the mind between motives or reasons, with consequent indecision and doubt.

    Equilibrium valve (Steam Engine), a balanced valve. See under Valve.

Wiktionary
equilibria

alt. (plural of equilibrium English) n. (plural of equilibrium English)

WordNet
equilibria
equilibrium
  1. n. a chemical reaction and its reverse proceed at equal rates [syn: chemical equilibrium]

  2. a stable situation in which forces cancel one another [ant: disequilibrium]

  3. equality of distribution [syn: balance, equipoise, counterbalance]

  4. a sensory system located in structures of the inner ear that registers the orientation of the head [syn: labyrinthine sense, vestibular sense, sense of balance, sense of equilibrium]

  5. [also: equilibria (pl)]

Usage examples of "equilibria".

Russell Lande's argument too, about a line of equilibria in sexual selection, rests upon assumptions that may well not be true in nature.

If this assumption is violated, as it well may be, the 'line' of equilibria collapses into a single point of equilibrium.

Since the theory of punctuated equilibria frequently is confused with true saltation, it is important here to discuss saltation, and show why it cannot be a significant factor in evolution.

It was necessary, because the theory of punctuated equilibria is frequently confused with saltatory evolution.

But it was a digression, because the theory of punctuated equilibria is the main topic of this chapter, and that theory in truth has no connection with macromutation and true saltation.

The Molts, though not indigenous to any of the worlds they were known to occupy, formed stable equilibria wherever man had placed them.

How do they propose to maintain the carbonate-silicate cycle and the other equilibria necessary for life to last?