The Collaborative International Dictionary of English v.0.48:
Cibol \Cib"ol\, n. [F. ciboule, LL. cepula, cepola, dim. of L. cepa, caepa, caepe, an onion. Cf. Chibbal, Cives.] A perennial alliaceous plant (Allium fistulosum), sometimes called Welsh onion. Its fistular leaves areused in cookery. [1913 Webster]