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 training. In addition to our fixed date training courses, we also run training on an ad hoc basis. Our current ad hoc training includes practical necropsy, micro computed tomography (micro-CT) and phenotyping, with the possibility that other courses may be developed in the future.