supernatant

supernatant

UK[ˌsuːpəˈneɪtənt]US[ˌsuːpərˈneɪtənt]
adj

(of a liquid) lying above a solid residue after precipitation, centrifugation, or other separation process.

n

a liquid lying above a solid residue after separation.

Morpheme Breakdown

super
natant
super

above

natant

floating

Etymology

the word 'supernatant' is a modern scientific term formed from classical latin components. the prefix 'super-' directly from latin, meaning "above" or "over", has been a productive element in english for centuries. the second element derives from the latin verb 'natare', meaning "to swim" or "to float". the literal combination, "floating above", perfectly captures the word's technical meaning in chemistry and biology, describing a clear liquid that separates and rests atop a denser solid or precipitate after a mixture settles or is centrifuged. this construction demonstrates the continued use of precise latin vocabulary to create unambiguous terminology in the sciences.

Analysis

Structure: super (above) + natant (floating) super (latin origin, meaning "above, over", a prefix indicating position or degree). natant (from latin 'natant-', present participle stem of 'natare' meaning "to swim, float", a combining form indicating floating).

Examples

after centrifugation, the clear supernatant was carefully pipetted off for analysis.

the supernatant fluid contained the dissolved proteins, while the pellet held the cellular debris.

decant the supernatant without disturbing the sediment at the bottom of the beaker.