iso-, is-

(Greek: equal; by extension: same, similar, alike; normally used as a prefix)

Used in numerous terms, nearly all scientific; denoting: equality, similarity, uniformity, or identity; the second element being properly and usually of Greek origin, rarely of Latin [the proper prefix in the latter case being equi-]. In biology, denoting for or from different individuals of the same species). For a large list of iso- opposites or antonyms, see aniso-.

Producing equal amounts of vital energy.
Binary digits having the same value.
A line drawn through geographical points at which a given phase of thunderstorm activity ooccurred simultaneously.
isobryous, isobrious
In botany, growing with equal vigor on both sides; applied to a dicotyledonous embryo.
isocapnia (s) (noun), isocapnias (pl)
A state in which the arterial carbon dioxide pressure remains constant or unchanged.
isocarpic, isocarpous
Having the same number of carpels (pistils) and perianth (petal) divisions.
isocephalic, isocephalous, isocephalic
In art, having the heads of the principal figures (whether seated, or standing, or mounted on horses) arranged in one horizontal line or nearly so; said especially of Greek bas-reliefs and friezes.
isoceraunic, isokeraunic
Indicating or having equal frequency or intensity of thunderstorm activity. An isoceraunic line is a line drawn through geographical points at which some phenomenon connected with thunderstorms has the same frequency or intensity; used for lines of equal frequency of lightning discharges.
A line connecting points on the earth’s surface at which the aurora is observed with equal frequency.
isocheime, isochime
A line connecting places on the earth’s surface having the same mean winter temperature.
1. Of uniform color.
2. Denoting two objects of the same color.
3. In optics, having the same color.
1. Having an equal affinity for the same dye; said of cells or tissues.
2. Staining equally with the same stain.
An abnormal chromosome with two identical arms due to duplication of one arm and loss of the other arm.

Isochromosomes are found in some girls with Turner syndrome (chromosome disorder in females that is characterized by the absence of all or part of a second sex chromosome in some or all cells), patients with the Pallister-Killian syndrome (a condition with multiple malformations at birth and mental retardation), and some tumors.

isochronal, isochronous
1. Acting in uniform time, or taking place at regular intervals.
2. Equal in time; contemporary; occurring during the same time.
A line on a chart connecting all points having the same time of occurrence of particular phenomena or of a particular value of a quantity.

Inter-related cross references, directly or indirectly, involving word units dealing with "equal, identical, same, similar": auto-; emul-; equ-, equi-; homeo-; homo-; pari-; peer; rhomb-; syn-; tauto-.