[noun] (physics) deformation of a physical body under the action of applied forces
[noun] difficulty that causes worry or emotional tension; "she endured the stresses and strains of life"; "he presided over the economy during the period of the greatest stress and danger"- R.J.Samuelson Synonyms: stress
[noun] (psychology) nervousness resulting from mental stress; "his responsibilities were a constant strain"; "the mental strain of staying alert hour after hour was too much for him" Synonyms: mental nervous
[noun] a special variety of domesticated animals within a species; "he experimented on a particular breed of white rats"; "he created a new strain of sheep" Synonyms: breed, stock
[noun] (biology) a group of organisms within a species that differ in trivial ways from similar groups; "a new strain of microorganisms" Synonyms: form, variant, var.
[noun] a lineage or race of people Synonyms: breed
[noun] injury to a muscle (often caused by overuse); results in swelling and pain
[noun] pervading note of an utterance; "I could follow the general tenor of his argument" Synonyms: tenor