• A capsule dehiscing transversely by a lid that falls off to release the seeds.
  • In old arms and armor, an engine-of-war: probably the same as <internalXref urlencoded="culverin">culverin</internalXref>, the early form of cannon.
  • In <em>Greek antiquity</em> and <em>archaeology</em>, a type of cylindrical vase or box with a cover, used especially by women, as for the toilet. See cut in preceding column.
  • A box; a jewel-case.
  • In <em>anatomy</em>, the cotyloid cavity, or acetabulum of the hip-joint.
  • [<em>capitalized</em>] A genus of brachiopods
  • [<em>capitalized</em>] In <em>conchology</em>, a genus of gastropods.
  • [<em>capitalized</em>] A genus of land-tortoises of the family <em>Testudinidæ</em>, having the anterior part of the plastron so movable that it can be shut like the lid of a pyxis.
  • A tortoise of this genus, the only known species, <em>Pyxis arachnoidea</em>, of Madagascar and Mauritius. Its shell is yellow, with broad black bands radiating from the center of the dorsal shields.
  • [<em>capitalized</em>] In <em>entomology</em>, a genus of coleopterous insects.
  • In <em>botany</em>: A seed-vessel, commonly a capsule, with a circumscissile dehiscence, the top falling away like a lid, as in the common purslane and plantain, and in the fruit known as monkey-pots. See <internalXref urlencoded="Lecythis">Lecythis</internalXref>, and cut under <internalXref urlencoded="circumscissile">circumscissile</internalXref>.
  • The theca of mosses. Also <internalXref urlencoded="pyxidium">pyxidium</internalXref>.
  • A box; a pyx.
  • A pyxidium.
  • The acetabulum. See <er>Acetabulum</er>, 2.
  • A small <xref>box</xref>
  • : A <xref>capsule</xref> in which the <xref>lid</xref> separates from the top of the <xref>fruit</xref>; a <xref>pyxidium</xref>
  • A <xref>nautical</xref> <xref>compass</xref>
  • fruit of such plants as the plantain; a capsule whose upper part falls off when the seeds are released
  • a small box used by ancient Greeks to hold medicines
  • a constellation in the southern hemisphere near Puppis and Antlia
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