What's the difference between hourglass and sandglass?
Hourglass
Definition:
(n.) An instrument for measuring time, especially the interval of an hour. It consists of a glass vessel having two compartments, from the uppermost of which a quantity of sand, water, or mercury occupies an hour in running through a small aperture unto the lower.
Example Sentences:
(1) We already have an hourglass economy, with plenty of room at the top for those with existing wealth and access to capital, and a wide, flat base of lower-paid jobs that cannot be automated.
(2) These results are consistent with the hypothesis that the birds use a circadian clock rather than an hourglass mechanism of timing.
(3) As a white hourglass moves across a black background, the middle appears to lag behind its true position, resulting in the apparent bending of the axis of the hourglass.
(4) On the other hand, prepared curved canals were invariably hourglass in shape.
(5) "T experiments" demonstrate that the clock controlling termination of larval diapause in Ostrinia nubilalis is an hourglass mechanism that measures 8 hours of darkness.
(6) A "distal hourglass" gastric deformity was present, along with gastritis and marked spasm.
(7) Three anatomic types of cor triatriatum were identified in the cases studied at necropsy: diaphragmatic (10 cases), hourglass (3) and tubular (3).
(8) In some cases, they’ve also longed for Barbie’s blue eyes and flawlessly applied brown eye shadow, her perfect hourglass figure, long and shiny blonde hair and thigh gap, too.
(9) The primary findings consist of (1) a cerebral surface that is agyric or agyric with pachygyric areas, (2) a cerebral contour that is oval or "hourglass" due to lack of or incomplete opercularization of the brain, and (3) an abnormal gray-white-matter distribution in the cerebral hemispheres.
(10) Bamba Issa took its inspiration from a Disney comic book, Donald Duck and The Magic Hourglass , which UFO felt was “an allegory for capitalism, its arrogance and shortcomings”.
(11) Typically, these bones showed an "hourglass" constriction midshaft and anterior bowing.
(12) In 7 of 31, an hourglass configuration of the left ventricular cavity was noted.
(13) Further, the main cause of delayed gastric emptying was revealed to be the deformity itself, because the shortening of the distance from the gastric angle to the pyloric ring at the lesser curvature (sac-shaped stomach) and the indentation of the corpus ventriculi (hourglass-shaped stomach) significantly delayed gastric emptying.
(14) Bilobed and multiseptated gallbladder have been described before, but this is the first isolated case of a congenital hourglass gallbladder.
(15) The possibility and the problems of an surgical technique because of cervical insufficiency in the 2. trimester with a hourglass amniotic prolapse is shown in three cases.
(16) The net movement of the label from the labeled membrane to the adjacent unlabeled membrane in each of the hourglass-shaped fusion products was recorded by micrography at various known times after the fusion took place, but before equilibrium was achieved.
(17) The diagnostic value of the method is higher in tumors of superocervical localization and hourglass tumors.
(18) Associated anomalies were found in five cases of the diaphragmatic type and in each case of the hourglass of tubular types.
(19) The meningocele resembled an hourglass made up of intrasacral and anterior sacral components.
(20) It is plausible that overt rhythms of both oscillators are complex, mainly because of the interaction of hourglass principle with circadian clock mechanism.
Sandglass
Definition:
(n.) An instrument for measuring time by the running of sand. See Hourglass.
Example Sentences:
(1) The sandglasses were turned half-hourly in maritime navigation and the wheel-clocks on shore had only the hour-hand.
(2) The structure of the adventitia and its typical behavior during rupture procedure explains better the 'sandglass formation' in arterial ruptures with fractures and dislocations.