avidity

/AH0 V IH1 D IH0 T IY0/
noun
  1. 1

    Greediness; strong appetite.

  2. 2

    Eagerness; intenseness of desire.

    โ€œto eat with avidityโ€

  3. 3

    The measure of the synergism of the strength of individual interactions between proteins.

Source: https://en.wiktionary.org/wiki/avidity