Theca

As theca (plural: thecae ), also theca (plural counters ) are referred to:

• Theca (single cell) , a collective name for different shells of single-celled algae and protists.
• the sheath of the ovarian follicle derived from the stroma, see theca cell
• in the zoology of living tubes of sessile animals, for example:
  • the protein-built living tubes of the graptolites
  • the calcareous ring walls of the coral calyx at the hard corals
  • a peridermal covering that can surround the polyps of cnidarians
• in botany the halves of the anthers in Bedecktsamern

This is a disambiguation page for differentiating between several terms identified with the same word.