isoline
curve joining points with equal value on a 2D graphic representation
isobar
line of equal or constant pressure on a graph, plot, or map
isotherm
line of equal temperature
equal-loudness contour
frequency characteristics of hearing and perceived volume
isentrope
line of same entropy
isophote
connects points using geometry
isogon
isoline
isogon
isoline
cherry blossom front
annual observation of cherry tree bloomouts across Japan (progressing from south to north along temperature gradients) as measured by 59 sample trees
isobath
line between points of same depth
isohyet
line joining points of equal rainfall on a map in a given period
isoseismal map
type of map used in seismology
agonic line
line of zero magnetic declination, along which the needle points due north and south.
contour line
line on a map connecting points of equal elevation
isocline
curve on a plane determined by a differential equation
isogloss
geographic boundaries between where linguistic features are used
isostere
contour line of specific volume or gas density