What is the meaning of Zij?

An Islamic book that tabulates parameters used for various astronomical events and movements.

she; third-person singular feminine subjective personal pronoun

they; third-person plural subjective pronoun

side (the side of one's body); flank

archaic form of zijde (“silk”)

singular present subjunctive of zijn

singular present subjunctive of wezen

singular present imperative of zijn

misspelling of zei

Source: wiktionary.org