(prefix)(contour lines)iso

(1)isabnormal               line connecting points of equal deviation
from mean temperature
(2)isacoustic               line connecting points of equal acoustic quality
(3)isallobar                line connecting points of equal change in
barometric pressure
(4)iseidomal                line connecting points of equal visibility
of a spectacle
(5)isentropic               line connecting points of equal entropy
(6)isobar                   line connecting points of same atmospheric pressure
(7)isobase                  line connecting points of equal land upheaval
(8)isobath                  line connecting points of equal underwater depth
(9)isobathytherm            line connecting points of equal temperature and
depth underground
(10)isobront                line connecting points of simultaneous storm
development
(11)isochar                 line connecting points of similar
distinguishing characteristics of plant life
(12)isochasm    line connecting points of equal frequency of aurorae
(13)isocheim    line connecting points of same average winter temperature
(14)isochlor    line connecting points of equal chlorine concentration
(15)isochor     line connecting points of varying conditions under constant volume
(16)isochrone   line connecting points of equal time difference or
simultaneous occurrence
(17)isoclinal   line connecting points of same magnetic dip
(18)isocryme    line connecting points of equal winter temperature
(19)isodose     line connecting points that receive equal doses of radiation
(20)isodrosotherm       line connecting points of equal dew point
(21)isodynamic  line connecting points of equal magnetic intensity
(22)isoflor     line connecting points of equal number of plant species
(23)isogam              line connecting points of equal acceleration due to gravity
(24)isogen              line connecting points of equal birthrates
(25)isogeotherm         line connecting points of equal subterranean temperature
(26)isogloss    line connecting points of similar regional dialect
(27)isogon              line connecting points of same specified angle or
same wind direction
(28)isogonal    line connecting points of equal magnetic declination
(29)isograd     line connecting points of similar conditions during
geological metamorphism
(30)isogram     line connecting points on a map having some similar feature
(31)isograph    line connecting points of same linguistic usage in some respect
(32)isohaline   line connecting points of equal salinity
(33)isohalsine  line connecting points of equal ocean salinity
(34)isohel              line connecting points of equal sunlight
(35)isohyet     line connecting points of equal rainfall
(36)isokeraunic         line connecting points of equal occurrence of thunderstorms
(37)isolex              line connecting points of same vocabulary usage
(38)isoline     line connecting points on a map having some similar feature
(39)isomagnetic         line connecting points of equal magnetic induction
(40)isometric   line connecting points of equal variations of pressure
(41)isomorph    line connecting points of same linguistic morphological forms
(42)isonephelic         line connecting points of equal cloud cover
(43)isopach     line connecting points of equal thickness of geological strata
(44)isophene    line connecting points of the same phenotype or seasonal variation
(45)isophote    line connecting points of equal light intensity from a
given source
(46)isopiestic  line connecting points of equal pressure but varying
temperature and volume
(47)isopiptesis         line connecting points of same arrival date of
migratory species
(48)isopleth    line connecting points of equal aspect of climate
(49)isopor              line connecting points of equal annual change in
magnetic field
(50)isopycnic   line connecting points of equal density
(51)isorithm    line connecting points of equal population density
(52)isoseismal  line connecting points of same earthquake intensity
(53)isostere    line connecting points of equal specific volume of a substance
(54)isotac              line joining points where the ice melts at the
same time of year
(55)isotach     line connecting points of the same wind speed
(56)isothere    line connecting points of equal summer temperature
(57)isotherm    line connecting points of equal temperature
(58)isothermobath       line connecting points of equal temperature at a
given ocean depth
(59)isotherombrose      line connecting points of equal ratio of summer
rainfall to annual rainfall
(60)isovol              line connecting points of equal ratio of fixed to
volatile carbon in coal