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.
The phrase ad hoc means something formed for a specific purpose: an ad hoc committee, for example, is the opposite of a standing committee. Thus, ad hoc internal investiga â¦ tions would be specific investigations, rather than a periodic review.he phrase ad hoc means something formed for a specific purpose: an ad hoc committee, for example, is the opposite of a standing committee. Thus, ad hoc internal investiga â¦ tions would be specific investigations, rather than a periodic review.