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-.

isopach, isopachous
A line on a map that connects points of equal thickness within a particular stratigraphic unit or group of units.
isopag
An equiglacial line connecting points where ice is present for approximately the same number of days in winter.
isopathy
1. The theory that disease may be cured by a product of the disease, as small-pox by application of the variolous matter.
2. The popular notion that disease in a particular organ may be cured by eating the same organ of a healthy animal.
3. A method of treating disease by administering products of the disease or portions of the affected organ.
isopectic
A line on a weather map connecting points where ice formation begins at approximately the same time at the onset of winter.
isoperimeter
A figure having a perimeter equal to that of another.
isoperimetry
1. That branch of geometry which deals with isoperimetrical figures, and the problems connected with them.
2. The science of figures having equal perimeters or boundaries.
isophagous
Feeding on one or allied species; such as, fungi.
isophenomenal (s) (noun), isophenomenals (pl)
About a line on a map, connecting places at which phenomena of any kind are equal.
isophone
1. A line on a language map surrounding an area within which a particular pronunciation is used.
2. A phonetic isogloss; also, a phonetic feature shared by speakers in contiguous areas.
3. Phonetic feature shared by some but not all of the speakers of a dialect, language, or group of related languages.
isophote, isophotic
A line (imaginary or in a diagram) connecting points where the brightness or the illumination is the same.
isophyllous
Having uniform (similar form) foliage leaves, on the same plant or stem.
isophytoid
An individual plant of a compound plant-organism, not differentiated from the rest.
isopia
Equal vision in the eyes.
isopiestic
Representing, having, or characterized by equal or constant pressure; also, a line in a diagram representing states of equal pressure.
isoplankt
Line representing, on a map, distribution of equal amounts of plankton, or of particular plankton species.

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-.