1. plural of isograph; words or names that are spelled identically but may have different pronunciations or meanings (also called homographs).
Usage: linguistics term; often used interchangeably with 'homographs' in modern usage
2. lines on a map or chart connecting points of equal value or characteristic.
Usage: technical/cartography term; less common than 'isograph' in singular form

Examples

• The words 'read' (present tense) and 'read' (past tense) are isographs with different pronunciations.
• In English, 'bow' (to bend) and 'bow' (front of a ship) are common isographs.
• Meteorologists use isographs to show areas of equal temperature on weather maps.
• The map displayed isographs indicating regions with the same annual rainfall.
• Students learning about homophones often confuse them with isographs, which are spelled the same but may sound different.