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Definitions from WordNet

Definitions from the Web

Calyptra

A calyptra is a botanical term that refers to the hood or cap-like structure that protects the developing spore capsule or sporangium in mosses. It is also known as a "moss cap" or "moss hood." Calyptra is derived from the Greek word "kalyptra," meaning veil or covering.

Examples and Usage

Noun

Sense 1:

In the context of botany, calyptra refers to the protective structure enclosing the sporangium or spore capsule in mosses. It is formed by the modified tip of the gametophyte.

Example:

The calyptra of the moss gradually splits open, allowing the spores to be released into the environment for dispersal.

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