https://www.electronicdesign.com/technologies/components/passives/article/21779933/discoidal-caps-have-tiny-profile
Discoidal Caps Have Tiny Profile | Electronic Design
With a 0.040" maximum thickness and a 0.080" outer diameter, these miniature, multi-layer discoidal feed-through capacitors are well-suited for filtering and...
discoidalcapstinyprofileelectronic
https://www.gpb.org/television/show/antiques-roadshow/season/28/celebrating-native-american-heritage/extras-16
Appraisal: Mississippian Granite Discoidal, ca. 1000 - 1500 | Georgia Public Broadcasting
appraisalmississippiangranitediscoidalca