delta2
/ˈdɛltə/
noun: delta; plural noun: deltas
a triangular tract of sediment deposited at the mouth of a river, typically where it diverges into several outlets.

"the Nile delta"

noun: delta; plural noun: deltas
1.
the fourth letter of the Greek alphabet ( Δ, δ ), transliterated as ‘d’.

BRITISH
a fourth-class mark given for an essay, examination paper, or other piece of work.
the fourth in a series of items, categories, etc.
modifier noun: delta

"delta hepatitis"

D
E
F
EN
D
IN
G

deafening (comparative more deafening, superlative most deafening)

Loud enough to cause temporary or permanent hearing loss.

(hyperbolic) Very loud.

Derived terms
deafening silence

AS HEARING LOSS

DNA shearing is an experimental process used to prepare DNA for analysis or other processing by the use of mechanical instruments to randomly cleave DNA. DNA is sheared to the desired fragment range. For instance, physical shearing can be done by probe sonication and nebulization.

During sonication, DNA samples are subjected to hydrodynamic shearing by exposure to brief periods of sonication.

Sonication, a type of hydrodynamic shearing, subjects DNA to acoustic cavitation and hydrodynamic shearing by exposure to brief periods of sonication, usually resulting in 700bp fragments. ... The DNA pass through a gauge needle several times to physically tear the DNA into fine pieces.

Acoustic cavitation, in simple terms, is the growth and collapse of preexisting microbubbles under the influence of an ultrasonic field in liquids. The cavitation bubbles can be characterized by the dynamics of oscillations and the maximum temperatures and pressures reached when they collapse.

Ulrasound is sound that have high pitched for the human ear to hear and is out of human audible range. Ultrasonic is an adjective which is used to describe a sound as being an ultrasound.

Fig. 1: (A) Geometry of a linear ultrasonic array. Each element face has area w X h and the elements are spaced by p. (B) Geometry of rotated linear array