plural of hourglass figure

(engineering) Physical deformation into an hourglass shape.

(engineering) Physically deformed into an hourglass shape.

(astronomy) The number of meteors a single observer would see in one hour under a clear, dark sky (i.e. up to the limiting apparent magnitude of 6.5).

plural of Zenithal Hourly Rate

Once every half-hour, every 30 minutes.

At intervals of a half-hour, every 30 minutes.

Without hours; unaware of the passing of time

Alternative form of Ahura Mazda

plural of hourglass drum