Pronunciation: [ˈa͡ɪs lˈa͡ɪn] (IPA) 
The term "ice line" refers to the boundary in space beyond which water cannot exist in a liquid state, due to the extremely low temperature. In terms of spelling, the word "ice" is transcribed as /aɪs/, with a long "i" sound and a soft "s" sound. "Line" is transcribed as /laɪn/, with another long "i" sound and a nasal "n" sound. When combined, "ice line" is pronounced as /aɪs laɪn/, with emphasis on the first syllable of each word.
The term "ice line" is a noun that refers to the imaginary boundary in the solar system beyond which the temperature is low enough for volatile substances, such as water, ammonia, and methane, to exist in solid form as ice. This boundary, also known as the frost line or snow line, is typically found in regions far from the heat of the sun, such as in the outer regions of planetary systems or in the far reaches of the Kuiper Belt and Oort Cloud. It represents the transitional zone between the inner rocky or metallic bodies and the outer icy bodies of celestial objects.
The ice line plays a crucial role in the formation and evolution of planets, moons, and other small bodies. In the early stages of planetary formation, when protoplanetary disks consisting of gas and dust surround young stars, the ice line acts as a demarcation point where volatile materials condense and accrete into larger objects, leading to the formation of icy planetesimals and eventually larger icy bodies like comets and dwarf planets.
Scientists study the ice line to gain insights into the composition, structure, and dynamics of celestial bodies, as well as to better understand the formation and development of planetary systems. Observations and modeling of the ice line have helped reveal important aspects of our own Solar System's history and have contributed to the study of exoplanets and the potential for habitability beyond Earth.
The word "ice line" is composed of two separate words: "ice" and "line".
The word "ice" comes from the Old English word "is", which evolved from the Proto-Germanic word "isaz". This word eventually gave rise to the modern English term "ice", referring to the solid form of water that occurs at or below the freezing point.
The word "line" is derived from the Old English word "line", which originated from the Latin word "linea", meaning "string" or "cord". The Latin term was derived from the classical Greek word "linon", which had a similar meaning.
When these two words are combined, "ice line" refers to the boundary or line where ice begins or ends.
