Discovered or determined by scientific observation:
— Variation in the ascertained flux depends on a number of factors.

synonyms: discovered, observed.

Roget 474: certain, sure, assured etc. v.; solid, well-founded.    unqualified, absolute, positive, determinate, definite, clear, unequivocal, categorical, unmistakable, decisive, decided, ascertained.    inevitable, unavoidable, avoidless^†; ineluctable.    unerring, infallible; unchangeable etc. 150; to be depended on, trustworthy, reliable, bound.    unimpeachable, undeniable, unquestionable; indisputable, incontestable, incontrovertible, indubitable; irrefutable etc. (proven) 478; conclusive, without power of appeal.    indubious^†; without doubt, beyond a doubt, without a shade or shadow of doubt, without question, beyond question; past dispute; clear as day; beyond all question, beyond all dispute; undoubted, uncontested, unquestioned, undisputed; questionless^†, doubtless.    authoritative, authentic, official.    sure as fate, sure as death and taxes, sure as a gun.    evident, self-evident, axiomatic; clear, clear as day, clear as the sun at noonday.    ... show more

Roget 490: knowing etc. v.; cognitive; acroamatic^†.    aware of, cognizant of, conscious of; acquainted with, made acquainted with; privy to, no stranger to; au fait with, au courant; in the secret; up to, alive to; behind the scenes, behind the curtain; let into; apprized of, informed of; undeceived.    proficient with, versed with, read with, forward with, strong with, at home in; conversant with, familiar with.    erudite, instructed, leaned, lettered, educated; well conned, well informed, well read, well grounded, well educated; enlightened, shrewd, savant, blue, bookish, scholastic, solid, profound, deep-read, book-learned; accomplished etc. (skillful) 698; omniscient; self-taught.    known etc. v.; ascertained, well-known, recognized, received, notorious, noted; proverbial; familiar, familiar as household words, familiar to every schoolboy; hackneyed, trite, trivial, commonplace.    cognoscible^†, cognizable.    ... show more