Adherence to (compliance with) drug treatment is important. However, only about half the people who leave a doctor's office with a prescription take the drug as directed. Among the many reasons people give for not adhering to drug treatment, forgetfulness is the most common.
Definition of periodical. 1  1 : periodic 1. 2  2a : published with a fixed interval between the issues or numbersb : published in, characteristic of, or connected with a periodical.
Submit. Â· just now. Report Abuse. Typically a volume is a publication that is part of a series, whether it's a continuing publication like a journal, or a book that has to be published in several volumes-this might be due to the size of the book, or the addressing of a different topic in each book.