zipper, zucchini, zucchetto
A priests skull cap is called a "Zuchetto". Another name for it is a "Callote". Ref: www.myfreedictionary.com
The zucchetto is removed at the commencement of the Preface and replaced at the conclusion of the Communion.
Popes customarily wear a white zucchetto and that included Pope John XXIII.
Yes a skullcap, called a zucchetto in Roman Catholic tradition, is worn by Roman Catholic clergy in some cases. It arose during the time when a tonsure was worn by all clergy as a way to keep the head warm. As a rule, a purple zucchetto is worn by Arch/Bishops, red by Cardinals, and white by the Pope; brown or black zucchetto's are sometimes worn by Franciscan, Benedictine, and Trappist monks.
Biretta or, in some rare cases, a zucchetto may be worn. However, the zucchetto is more commonly worn by a bishop or cardinal.
A zucchetto actually just sits lightly on top of the head. It is similar to the Jewish kippah, but has a much different significance.Source:http://www.absoluteastronomy.com/topics/Zucchetto
There are no special rituals concerning the zucchetto, the skull cap worn by bishops, cardinals and popes. It is removed at the Preface of Mass and replaced after communion.
The pope does not wear a yamaka, he wears a white zucchetto. A Zucchetto is a small round skullcape worn by all prelates in the Catholic Church; white for the pope, red for cardinals, purpose for bishops, and black for abbots. Other priests may also wear a black zucchetto.
Roman Catholic AnswerI'm going to step out on a limb here and assume that you're asking if Catholics wear skull caps. The answer is yes, for priests and bishops. It is called a zucchetto, a small round skullcap and it is different colors depending on who is wearing it: The Holy Father wears a white zucchetto, Cardinals wear a red zucchetto, and there is a ceremony when the Holy Father creates Cardinal in which he personally gives them their zucchetto. Purple is for bishops and some Monsignors, and black is for abbots (the ruler of a monastery), although I have seen some priests wearing a black zucchetto as well.
Zucchetto is a hat. It is worn by clerics.
Zucchini is a fruit. Zucchetto is a skullcap.