Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† cāla, ae, f. [κᾶλον], a piece or billet of wood: scinde, puero calam ut caleas, i. e. scinde fustes et fac focum, Lucil. ap. Serv. ad Verg. A. 6, 1 (Fragm. Inc. 139).