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.
Vikingsâ first season launch had clocked a whopping 6.2 million viewers â 2.5 million adults 18-49 and 2.7 million adults 25-54 â but, as History points out, the lead-in for its series launch last year was rating behemoth The Bible.istory notes that last nightâs debut was up 3% in total viewers, 10% in men 25-54 and 18-49, and 6% in adults 18-49 compared to the average for those episodes.