smolt

/S M OW1 L T/
adjective
  1. 1

    Bright; serene.

  2. 2

    (of weather) Calm; fine; fair.

  3. 3

    Smooth and shining.

noun
  1. 1

    A young salmon two or three years old, when it has acquired its silvery color.

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