I. de·cam·e·ter də̇ˈkaməd.ə(r), -deˈ- noun
Etymology: Greek dekametron, from deka ten + metron meter, measure — more at ten , measure
: a poetic line of 10 feet
II. deca·me·ter ˈdekəˌmēd.ə(r) noun
Etymology: French décamètre, from déca- deca- + mètre meter
: a metric unit of length equal to 10 meters — see metric system table