Strain may refer to:
Science and technology
- Strain (biology), variants of plants, viruses or bacteria; or an inbred animal used for experimental purposes
 - Strain (chemistry), a chemical stress of a molecule
 - Strain (injury), an injury to a muscle (tear in tendon) in which the muscle fibers tear as a result of over-stretching
 - Strain (mechanics), a geometrical measure of deformation representing the relative displacement between particles in a material body
 - Filtration, separating solids from fluids (liquids or gases) by interposing a strainer, a medium through which only the fluid can pass
 - Percolation, the movement and filtering of fluids through porous materials
 - Psychological stress
 
Other uses
- straining, in cooking, the separation of liquid from solids using a strainer or sieve.
 - straining (puréeing), the process of making a mash or purée by forcing through a sieve, rather than using a power blender. Cf. ricing (cooking)
 - strain (bridge), the indication of either the trump suit or notrump in a bid made in the game of contract bridge; also called a denomination
 
Proper names
Arts and media
- Strain (manga), a 1996 manga written by Yoshiyuki Okamura, and illustrated by Ryoichi Ikegami
 - Strain (music), a series of musical phrases that create a distinct melody of a piece
 - Strain (album), a 2004 album by Flesh Field
 - Strain: Strategic Armored Infantry, a 2006 anime
 - Strain (film), a 2020 Nigerian drama
 
Places
- Strain, Arkansas, an unincorporated community in Richland Township of the Southern United States
 - Strain, Missouri, an unincorporated community in Franklin County, Missouri, USA
 
See also
- Overwork
 - S Train (disambiguation)
 - Strain theory (disambiguation)
 - Strainer, a type of sieve used to separate solids from liquids, e.g. in cooking
 - The Strain (disambiguation)
 - Stressor
 
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