aniso-, anis- +

(Greek: unequal; by extension: unsymmetrical, uneven; dissimilar, unlike)

A combination of an- (Greek), "negative", "no", or "not"; plus iso-, "equal" resulting in unequal or not equal.

A formative of technical terms, in many cases merely the negative of corresponding terms in iso-.

aniseikonia, aniseikonic
A defect of vision marked by the presence of unequal images in each eye.
Differences in blood pressure in different parts of the cardiovascular system.
A word root meaning “not equal”.
Referring to a flower whose number of carpels is different from the number of stamens, petals, and sepals.
The unequal distribution of hemoglobin in the red blood cells, such that the periphery is pigmented and the central region is virtually colorless, as observed in films of blood from persons with certain forms of anemia caused by deficiency of iron; normal red blood cells show mild anisochromasia because of their biconcave shape.
anisochromia, anisochromatic
Not uniformly of one color.
A condition in which the two pupils of the eyes are not of equal size.
Considerable variation in the size of cells that are normally uniform, especially with reference to red blood cells.
anisodactyly (s) (noun), anisodactylies (pl)
1. Unequal length in corresponding fingers or toes; especially, referring to birds with three toes forward and one backward.

This is common with songbirds and other perching birds, as well as hunting birds; such as, eagles, hawks, and falcons.
2. Possessing corresponding digits of unequal length on either side of the body.
3. Having unequal toes.
4. A group of herbivorous mammals characterized by having the hoofs in a single series around the foot; such as, the elephant, rhinoceros, etc.

Pertaining to crystals or compounds in which the ionic bonds are unequal in strength.
Having differentiated or unequal teeth; heterodont.
1. Marriage between persons of unequal age, especially when there is a considerable age difference.
2. In botany, the union of two unequal gametes in reproduction.
3. Fusion of two gametes unequal in size or form; fertilization as distinguished from isogamy or conjugation.
1. Having jaws of unequal size, the upper being wider than the lower.
2. Having teeth in upper and lower jaws that are not the same.
Unequal enlargement of the male breast; unilateral gynecomastia in the male.
In botany, having the carpels (female reproductive structures in flowering plants) not equal in number to the sepals (the outermost whorl of a typical flower, probably representing a leaf modified as part of the protective outer layer of a flower).