"pertaining to or of the nature of representation," 1855, originally in philosophy, from representation + -al (1). Specifically of visual arts by 1923. Related: Representationally.
1865, in philosophy, "the doctrine that knowledge is only of relations," from relative (adj.) + -ism. Compare relativist.
late 14c., ethik "study of morals," from Old French etique "ethics, moral philosophy" (13c.), from Late Latin ethica, from Greek ēthike philosophia "moral philosophy," fem. of ēthikos "ethical, pertaining to character," from ēthos "moral character," related to ēthos "custom" (see ethos). Meaning "moral principles of a person or group" is attested from 1650s.
"the science of quantity; the abstract science which investigates the concepts of numerical and spatial relations," 1580s; see mathematic (the older form of the word in English, attested from late 14c.) + -ics. Originally one of three branches of Aristotelian theoretical science, along with first philosophy (or metaphysics) and physics (or natural philosophy).
Mystical doctrines as to the relation of time to eternity are also reinforced by pure mathematics, for mathematical objects, such as numbers, if real at all, are eternal and not in time. Such eternal objects can be conceived as God's thoughts. [Bertrand Russell, "A History of Western Philosophy"]
1846 in philosophy, "believer or upholder of the doctrine of sensationalism;" 1868 as "a sensational writer or speaker;" from sensational + -ist. Related: Sensationalistic.
"the metaphysics of mathematics," including the philosophy of non-Euclidian geometry, 1878, from meta- in the sense of "transcending, overarching, dealing with the most fundamental matters of" + mathematics. Related: Metamathematical.