The pileus (Ancient Greek: πῖλος, pîlos; also pilleus or pilleum in Latin) was a brimless felt cap worn in Ancient Greece, Etruria, Illyria (especially Pannonia), [1] [2] [3] [4] later also introduced in Ancient Rome. [5] The pileus also appears on Apulian red-figure pottery.

Many historians trace it to the pileus, a cap worn by the formerly enslaved in ancient Rome to indicate that they had been freed. — Greg Daugherty, Smithsonian Magazine, 18 June 2024 In certain types of clouds (pileus, lenticular, and certain types of cirrus), brilliant colors can be seen.

A pileus (/ ˈ p aɪ l i ə s /; Latin for 'cap'), also called scarf cloud or cap cloud, is a small, horizontal, lenticular cloud appearing above a cumulus or cumulonimbus cloud. Pileus clouds are often short-lived, appearing for typically only a few minutes, [1] with the main cloud beneath

Pileus, close-fitting, brimless hat worn by the ancient Romans and copied from the Greek sailor’s hat called the pilos. In Roman times the head was generally left uncovered, but commoners and freed slaves sometimes wore the felt pileus.

In mycology (the branch of biology that includes the study of mushrooms and other fungi), the pileus is the technical name for the cap, or cap-like part, of a basidiocarp or ascocarp (fungal fruiting body) that supports a spore-bearing surface, the hymenium. [1]

Dec 20, 2024 · Pileus clouds are lens-shaped clouds that form above the tops of larger cumulus or cumulonimbus clouds. Pileus clouds have attributes including their appearance, formation process, duration, and associated weather conditions.

The pileus (Ancient Greek: πῖλος, pîlos; also pilleus or pilleum in Latin) was a brimless felt cap worn in Ancient Greece, Etruria, Illyria (especially Pannonia), [1] [2] [3] [4] later also introduced in Ancient Rome. [5] The pileus also appears on Apulian red-figure pottery.

Pileus is a fleeting and beautiful ‘accessory cloud’, which means it is only found attached to other cloud forms. It shares much in common with lenticularis and cap clouds, which form when a stable airstream rises to pass over raised ground.

Sometimes several pileus clouds are observed above each other. Pileus is formed as a moist layer locally lifted due to rising cloud below. See cloud classification.

A Pileus, Pilleus or Pilleum in Latin, is a brimless, felt cap worn in Ancient Greece, Etruria, Illyria, Pannonia and surrounding regions, later also in Ancient Rome. During the 5th century BC, a bronze pileus appeared in Ancient Greece and it becoming a popular infantry helmet, often adorned with a horsehair crest.