退化的器官
1.Gradually disappearing; imperfectly or only slightly developed. Used of an organ or other part of an animal or a plant.
3.(2) Based upon the primitive and typical plants, some plants of the genus Acer were evolved in direction of reduction or even of entire degeneration of the elements of flower, some others were specialized by increasing of the elements of flower.
4.Either of the small, clublike balancing organs that are the rudimentary hind wings of flies and other dipterous insects.
5.A rudimentary or degenerate, usually nonfunctioning, structure that is the remnant of an organ or a part that was fully developed or functioning in a preceding generation or an earlier stage of development.
6.Purposelessness in natural structures, as manifested by the existence of vestigial or nonfunctional organs or parts.
7.of illness; marked by gradual deterioration of organs and cells along with loss of function.
8.Progressive degeneration of an organ or tissue caused by loss of cells
