Template:el-nF-ος-οι-3b1
The inflection-table template for Greek nouns declining like διάμετρος (diámetros). Other examples may be found in the Category:Greek nouns declining like 'διάμετρος'.
The syntax {{el-nF-ος-οι-3b1|διάμετρ|διαμέτρ}}
produces the table:
Declension of el-nF-ος-οι-3b1
A full list of other declension-table templates with a brief indication of use can be found at Wiktionary:Greek noun inflection-table templates.