manna lichen

Thân thiện

A traveler gathers manna lichen from the desert ground.

Definition

Noun: 1. A type of edible lichen: Any of several species of Old World lichens, primarily from the genus Lecanora, that have a partially crust-like or shrubby growth form. These lichens detach, dry into rolls, and are dispersed by wind across deserts in Africa and Arabia. Historically, they have been collected and used as a food source by people and animals.

Usage Examples

• Noun:
  • During the famine, the nomadic tribes relied on manna lichen as a crucial survival food.
  • Scientists studied the manna lichen to understand how it survives in such arid conditions.
  • The desert winds carry the light, rolled-up fragments of manna lichen across vast distances.

Advanced Usage

• Ecological and Historical Context: The term is often used in historical, anthropological, or botanical contexts to describe a specific natural resource of desert regions. It is associated with survival, scarcity, and traditional ecological knowledge.
  • The biblical reference to "manna from heaven" has been speculatively linked by some scholars to the phenomenon of windblown manna lichen.

Variants and Related Words

• Lichen (n): A composite organism arising from algae or cyanobacteria living among filaments of fungi in a symbiotic relationship. "Manna lichen" is a specific type of lichen.
• (n): The scientific name for one of the primary species known as manna lichen.

Synonyms

• Edible lichen: A general term for lichen species consumed as food.
• Desert lichen: A descriptive term highlighting its habitat.

Notes on Meaning

• The term is highly specific and refers to a natural phenomenon with historical significance as a food source. It is not a common word in everyday modern English but appears in specialized texts. The "manna" in the name draws an analogy to the biblical food, emphasizing its role as a seemingly heaven-sent sustenance in barren environments.

Học thuật

Noun

1. any of several Old World partially crustaceous or shrubby lecanoras that roll up and are blown about over African and Arabian deserts and used as food by people and animals