The plant leaves are lateral outgrowth of the stem which develop from the meristematic tissues of buds. They are the part of the plant shoot which serves as the chief food-producing organ in most vascular plants.
Adjective[edit] ad hoc â(comparative more ad hoc, superlative most ad hoc) 1  For a particular purpose. 2  Created on the spur of the moment; impromptu. ( sciences) (of a hypothesis) Postulated solely to save a theory from being falsified, without making any new predictions.
In other fields, the term could refer, for example, to a military unit created under special circumstances, a tailor-made suit, a handcrafted network protocol, or a purpose-specific equation. Ad hoc can also mean makeshift solutions, shifting contexts to create new meanings, inadequate planning, or improvised events.