Tract

• abstract: The tract (Latin: tractus) is part of the proper of the liturgical celebration of the Eucharist for many Christian denominations, which is used instead of the Alleluia during Lenten or pre-Lenten seasons, in a Requiem Mass, and on a few other penitential occasions, when the joyousness of an Alleluia is deemed inappropriate. Tracts are not, however, necessarily sorrowful.

以上来源于: WordNet