What is the meaning of Chancery_hand?

Either of two styles of handwriting: a written form of black letter used in France and England from about 1350, developed in the Lateran chancelry in the 13th century, or a style of cursive handwriting introduced in the 1420s by Niccolò de' Niccoli, developed from humanist minuscule; a variety of either of these styles.

Source: wiktionary.org