1592954110000 1312632483000 term-88684 1616541060063 1312632587000 1616290564120 adlib fitz-online adlib-term-88684 291e9ee8-4370-3794-8280-2728bd4f3a1f 2 1 scope note Timepieces that measure equal periods of time by the motion of sand or other freely flowing, fine-grained substances through a narrow aperture between two triangular or conical glass bulbs arranged mouth to mouth; probably introduced in the early 14th century and used then especially for timepkeeping aboard ships. reference term-88050 adlib-term-88050 7da38723-6eef-3194-8231-ca4d7da18ec5 sandglass V.TN.AFU.AFU.AXC.AFU.ALO 1 code V.TN.AFU.AFU.AXC.AFU.ALO 1 sandglasses reference term-88062 adlib-term-88062 ec2f00bc-b16c-3699-9553-4b8cfcc2020f <timepieces by form> sandglasses term