stratio-, strati-, strato-, strat- stratus

1. Lying prone or stretched out with the face downward, e.g., in worship or submission
2. Stretched out in a horizontal position, often because of illness or injury.
3. Drained of physical strength or incapacitated by overexertion or powerful emotion.
4. In botany, used to describe a plant that grows or trails along the ground.

See stratum.

1. Used to describe a rock formation that is made up of thin layers.
2. Arranged in thin layers.

1. The formation of layers in sedimentary rocks through biological, chemical, or physical changes in the sediments forming them.
2. The formation of layers, castes, classes, or other types of strata.
3. A situation or condition where something is arranged in several strata.
4. A layered arrangement or appearance of successive rock strata.
5. The storing of seeds in a chilled moist environment or material in order to induce germination or to preserve them.
6. In hydrology, the arrangement of water masses in a lake or other body of water into two or more horizontal layers having different characteristics.
7. The formation of layers in snow, ice, or firn as a result of snow sedimentation or other processes [a "firn" is a loose, permeable, granular material that is over a year old, and which is transitional between snow and glacier ice].

1. In geology, formed, arranged, or laid down in layers or strata.
2. In statistics, of a population, divided into parts on the basis of features such as age or geographical location.

1. Composed of layers, or with a layered appearance or arrangement.
2. Forming or formed as a layer.
3. Like or having the form of a stratus cloud.
4. In meteorology, of a cloud, having a predominantly horizontal development; the opposite of cumuliform.

In meteorology, a cloud species characterized by an extensive horizontal layer or series of layers, either continuous or noncontinuous; the most common form for the altocumulus and stratocumulus genera, and occasionally found in cirrocumlus.

1. To form something into a layer or layers, or become formed into a layer or layers.
2. To form or be formed into castes, classes, or other groups based on status.
3. The storing of seeds in a chilled moist environment or material in order to induce germination or to preserve them.
4. In geology, to form layers or strata.

In geology, a geologist who specializes in the study of stratigraphy.

1. The study of the origin, composition, and development of rock strata.
2. A section cut vertically through the earth showing its different layers and allowing artefacts to be dated according to the layers in which they are found.
3. The way in which rock strata are arranged, and the chronology of their formation.
4. In geology, a branch of geology that is concerned with the systemized study, description, and classification of stratified rocks, including their origins, composition, characteristics, distribution, and correlation with one another.

Commonly these layers are levels of sedimentary rock, but stratigraphy can also include the study of non-ossified sediments; such as, those in stream beds and lake bottoms, of inclusions in volcanic ash and lava, and even the study of different layers of human occupation.

The processes of sedimentation, including the presence of certain types of fossils, provide scientists with valuable clues about the age of the earth and its history.

These principles are valuable for many different types of scientists, ranging from prospecting geologists to city planner to archaeologists and paleontologists studying human and animal history and prehistory.

In geology, the part of the earth's crust that contains stratified rocks.

A cloud resembling cirro-stratus, but more compact in structure.