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.
ad hoc committee. A term of art for a committee formed with the purpose of addressing a specific issue or issues, which theoretically is disbanded once its function is achieved. A committee formed with the purpose of addressing a specific issue or issues, which theoretically is disbanded once its raison d'etre is finished.