head cap

n.

acrosomal cap

Example sentences from the Web for head cap

  • The edges of the boards may have a gold line run on them, and the head-cap may be decorated with a few dots.

    Bookbinding, and the Care of Books |Douglas Cockerell

  • The usual method of removing a book from the shelf is to hook a finger into the top of the back, or head-cap, and pull.

    Book Repair and Restoration |Mitchell Buck