Lichen Gold

Lichen

A lichen is a hybrid colony of algae or cyanobacteria living symbiotically among filaments of multiple fungus species, along with bacteria embedded in the cortex, or "skin", in a mutualistic relationship. Lichens are the lifeform that first brought the term symbiosis into biological context.

Gold

Gold is a chemical element; its chemical symbol is Au and atomic number 79. In its pure form, it is a bright-metallic-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal, a group 11 element, and one of the noble metals. It is one of the least reactive chemical elements, being the second lowest in the reactivity series, with only platinum ranked as less reactive. Gold is solid under standard conditions.

Gold (color)

Gold, also called golden, is a color tone resembling the chemical element gold.

lichen

Noun

1. Any of many symbiotic organisms, being associations of algae and fungi, often found as white or yellow-to-blue–green patches on rocks, old walls, etc.
2. Something which gradually spreads across something else, causing damage.

Verb

1. To cover with lichen.

gold

Noun

1. A heavy yellow elemental metal of great value, with atomic number 79.
2. A coin or coinage made of this material, or supposedly so.

Symbol

1. ☉ (alchemy)