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-.

isochronia (s) (noun), isochronias (pl)
1. The state of having the same chronaxie: Isochronia pertains to keeping the lowest limit of time that an electric current two times the threshold power must flow in order to stimulate a tissue.
2. Agreement, with respect to time, rate, or frequency, between processes: Isochronia is the correspondence of events with respect to time, rate, or frequency.
isochronic, isochronous (adjective) (not comparable)
Referring to something occurring at the same time or at a regular time: Sue's heartbeats were always isochronic, because they always beat in a steady and uniform way.

An isochronous pendulum or watch balance has the characteristics of a uniform rate of operation or periodicity.

isochronon (s) (noun), isochronons (pl)
A clock designed to keep very accurate time: In the science fiction movie, the main character looked at the isochronon to check out the exact time when her servant was to come into the room.
isoclinal, isoclinic
Inclining in the same direction; of or relating to an equal direction of inclination for various items.
Equality of size of both pupils of the eyes.
isocracy (s) (noun), isocracies (pl)
Equality of power or rule: Isocracy is a system of government in which all the people in the country possess equal political power.
A line connecting points on the earth’s surface at which the temperature is the same during a specified coldest period of the year.
A condition of having fingers (or toes) of equal length.
isodactylous, isodactyly
In zoology, having the fore and hind toes or digits equal or alike.
1. Pertaining to populations composed of an equal number of individuals.
2. Lines on a map that pass through points representing equal population densities.
Having equal diameters.
isodont, isodontous
1. Possessing all teeth of the same size and shape.
2. Of a snake, having maxillary teeth of the same size.
3. In zoology, having the teeth all alike, as some cetaceans.
A method of moving a fleet of ships from one formation to another by means of paths of equal length for each ship.
A line on a weather chart connecting locations having equal dew points.
A state of being of equal strength or power.

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-.