Admin - See

Modular Application
A type of grant application in which support is requested in specified increments without the need for detailed supporting information related to separate budget categories. When modular procedures apply, they affect not only application preparation but also review, award, and post-award administration.

Quoted from the NIH OER Glossary & Acronym List.

For additional information, visit the NIH OER Modular Grant Applications' Frequently Asked Questions webpage.