However, on some occasions that are heavily associated with Advent, such as the Rorate Mass (but not on Sundays), white is used. On the 3rd Sunday of Advent, Gaudete Sunday, rose may be used instead, referencing the rose used on Laetare Sunday, the 4th Sunday of Lent. During the Nativity Fast, red is used by Eastern Christianity, although gold is an alternative color.
fissure. 1. Anatomy a narrow split or groove that divides an organ such as the brain, lung, or liver into lobes. 2. a small unnatural crack in the skin or mucous membrane, as between the toes or at the anus. 3. a minute crack in the surface of a tooth, caused by imperfect joining of enamel during development. [ â²fishÂ·Ér ].
a shallow depression, or furrow on the surface of an organ, such as cerebral sulcus that separates the convolutions of the cerebral hemisphere. A sulcus is usually not as deep as a fissure, but, in the terminology of anatomy, the words sulcus and fissure are often used interchangeably.ollateral sulcus one on the inferior surface of the cerebral hemisphere between the fusiform and parahippocampal gyri. sulÂ´ci cuÂ´tis the fine depressions on the surface of the skin between the dermal ridges. gingival sulcus the groove between the surface of the tooth and the epithelium lining the free gingiva.