Sentence:  This receptacle is called a “<WSD>luna</WSD>” or “lunula” (a moon, or a little moon), and has glass on either side, so that the Host may be seen when enclosed therein. ... ¶ ... ¶ The ciborium, the pyx and <WSD>luna</WSD> of the ostensorium are blessed with a simpler formula than that used for the chalice, and ... ¶ ... ¶ The chalice, the paten, the <WSD>luna</WSD> and the pyx are sacred things, true sacramentals, and are worthy of deepest reverence; for ... 
Meaning of the word marked with <WSD> tags:  A '''lunette''': a crescent-shaped receptacle, often glass, for holding the (consecrated) host (the bread of communion) upright when exposed in the monstrance. (from 19th c.)<ref>“[http://books.google.com/books?id=y_RpbmWNfHcC&pg=PA314&dq=luna luna]” in Don S. Armentrout and Robert Boak Slocum (editors), "An Episcopal Dictionary of the Church: A User-Friendly Reference for Episcopalians", Church Publishing, Inc. (2000), (978-0-89869-211-2).</ref>