Noun
The word is derived from sulcus
of Sulcus
Source: Webster's dictionaryIn many mammals, the cerebral cortex consists of folded bulges called gyri that create deep furrows or fissures called sulci. Source: Internet
Colpi, sulci and pores are major features in the identification of classes of pollen. citation Pollen may be referred to as inaperturate (apertures absent) or aperturate (apertures present). Source: Internet
In the human brain more than two-thirds of the cerebral cortex is buried in the sulci. Source: Internet