Leaf. A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants.eaf (noun). something which is like a leaf in being wide and thin and having a flat surface, or in being attached to a larger body by one edge or end; as : (a) A part of a book or folded sheet containing two pages upon its opposite sides.
Production on Vikings season 4 is set to begin this spring in Ireland (presumably for an early 2016 premiere), while its third season will wrap up in about a month, on April 23rd.
In Australia, the series premiered on August 8, 2013 on SBS One. It was later moved to FX, which debuted the second season on February 4, 2015. Season three of Vikings began broadcasting in Australia on SBS One on March 19, 2015. Season four of Vikings began broadcasting in Australia on SBS One on February 24, 2016.