One of the two main roads in an ancient roman city, stretching through the city from north to south. The city's forum would normally be close to the point where the cardo crosses the decumanus.

Car"do (?), n.; pl. Cardies (#).) [L., a hinge.] Zool. (a)

The basal joint of the maxilla in insects.

(b)

The hinge of a bivalve shell.

 

© Webster 1913.