absciss

“George Crabb in 1823 defined co-ordinates now dropping its hyphen as “a term applied to the absciss and ordinates when taken in connexion,” later better known as the magnitudes that determine the position of a point; geographers and navigators still later used coordinates to describe the use of longitude and latitude in locating a spot on the globe.”

Simon & Schuster: The Right Word in the Right Place at the Right Time

“As soon as a majority of the catkins began to shed their pollen or to absciss their full developed anthers, the catkins were removed and dried on a sheet of smooth paper at room temperature until the pollen was shed.”

Northern Nut Growers Association Thirty-Fourth Annual Report 1943