- a case or receptacle.
- Botany, Mycology.
- a sac, cell, or capsule.
- a sporangium.
- Anatomy, Zoology. a case or sheath enclosing an organ, structure, etc., as the horny covering of an insect pupa or the loose membrane covering the spinal cord.
Origin of theca
Examples from the Web for thecal
Historical Examples of thecal
At the same time the thecal plates degenerated into spicules.
These two types are, in the main, correlated with two gradual differentiations in the minute structure of the thecal plates.
The brachia rise from a corresponding number of thecal plates, “radials (RR).”
- botany an enclosing organ, cell, or spore case, esp the capsule of a moss
- zoology a hard outer covering, such as the cup-shaped container of a coral polyp
Word Origin for theca
- Of or relating to a sheath, especially a tendon sheath.
- A case, covering, or sheath, such as the outer covering of the cocoon of certain insects.
- A case, covering, or sheath, such as the pollen sac of an anther, the spore case of a moss, or the outer covering of the pupa of certain insects.