Pronunciation: [bˈɪle͡ɪəd] (IPA) 
The word "bilayered" is spelled with two "l's" because it consists of two syllables (bi-lay-ered) and the "l" sound is pronounced in both syllables. The first syllable is "bi" which is pronounced as /ˈbaɪ/ with stress on the "i". The second syllable is "layered" which is pronounced as /ˈleɪərd/ with stress on the "e". The word refers to something that has two layers, such as a bilayered membrane or film.
Bilayered is an adjective that describes something consisting of or characterized by two layers or strata arranged in parallel or stacked on top of each other. Commonly used in scientific and technical contexts, this term refers to the specific arrangement of two distinct layers or sheets, often found in biological, chemical, or physical systems.
In the field of biology, bilayered primarily refers to the structure of cell membranes. Cell membranes are composed of two layers of phospholipids, known as the lipid bilayer, which create a boundary between the inside and outside of the cell. This bilayered structure provides a protective barrier and regulates the passage of ions and molecules in and out of the cell.
In other scientific disciplines like materials science and engineering, bilayered can refer to the arrangement of thin films or coatings. For example, a bilayered coating may consist of two layers of different materials applied onto a surface, each layer serving a specific purpose such as enhancing durability or providing a desired aesthetic.
Overall, bilayered describes the presence of two layers in a variety of contexts, emphasizing the parallel arrangement or stacking of these layers.
The word "bilayered" is derived from two main roots: "bi-" and "layered".
1. "Bi-" is a prefix that comes from the Latin word "bis", meaning "twice" or "double". It is commonly used to denote "two" or "having two". In the context of "bilayered", "bi-" refers to the presence of two layers.
2. "Layered" is the past participle form of the verb "layer", which originated from the Middle English word "layre" around the 14th century. It is derived from the Old French word "laier" and has its roots in the Latin word "larix", meaning "larch tree" or "plank". In the context of "bilayered", "layered" refers to the arrangement or composition of different layers.
