stricto sensu

Learned borrowing from Latin strictō sēnsū and sēnsū strictō, both meaning the same. Various misspellings exist, such as stricto senso, strictu sensu, senso stricto and sensu strictu, which can be attributed to ignorance of the underlying Latin grammar causing analogical leveling of the endings. (The only grammatically correct alternative form is sensu stricto, which is also commonly found in English.)