Noun

1. A line drawn on a pressure / volume / temperature graph through all points having the same value of the volume
2. A contour showing points of equal vertical thickness of strata; equal to an isopach if strata are horizontal
3. A sequence of DNA that has a reasonably constant proportion of pairs of guanine and cytosine bases, and is rich in genes

Related terms

• contour line
• isobar
• isotherm
• isodrosotherm
• isotach
• isogon
• isohyet
• isoquant
• isogloss
• isopleth