Noun

(aspides)

A type of round shield borne by ancient Greek soldiers

* {{quote-book, 1963, William Kurtz Wimsatt, What to Say About a Poem and Other Essays citation

, passage="shield both large and tough" has never said that aspides are small and weak

(archaic) An asp or generic venomous snake

* {{quote-book, 1588, , Pandosto: The Triumph of Time, chapter=The History of Dorastus and Fawnia, year_published=1907 citation

, passage=Flesh dipped in the sea Ægeum will never be sweet; the herb Trigion being once bit with an aspis never groweth, and conscience once stained with innocent blood is always tied to a guilty remorse.}}

(palynology) A prominent ring of thickened exine around a pore on a pollen grain

* {{quote-book, 1974, Eugene Cecil Ogden, Manual for Sampling Airborne Pollen citation

, passage=As might be expected, characters of the aspides themselves are not of much value in pollen identification, but they are easily recognized and many three-pored, aspidate grains are broadly categorized as "betuloid" in studies of airborne pollen.}}

Noun

(apsides)

(architecture) A recess or projection, with a dome or vault, at the east end of a church; an apse.

(astronomy) Either of the points in the elliptical orbit of a planet or comet where it is closest or furthest from the sun; perihelion or aphelion; an apside