melanosome

/ˈmɛlənoʊˌsoʊm/
noun
  1. A small organelle within a cell that produces and stores melanin, the pigment responsible for skin, hair, and eye color.
    • The number and size of melanosomes determine how dark a person's skin is.
    • In albinism, melanosomes are present but do not produce melanin properly.
    • Melanosomes are transferred from melanocytes to skin cells to give color.