late 14c., "worldly, secular;" also "terrestrial, earthly; temporary, lasting only for a time," from Old French temporal "earthly," and directly from Latin temporalis "of time, denoting time; but for a time, temporary," from tempus (genitive temporis) "time, season, moment, proper time or season," from Proto-Italic *tempos- "stretch, measure," which according to de Vaan is from PIE *temp-os "stretched," from root *ten- "to stretch," the notion being "stretch of time." Related: Temporally.

1570s, from French epilepsie (16c.), from Late Latin epilepsia, from Greek epilepsis "epilepsy," literally "a seizure," from epilambanein "to lay hold of, seize upon, attack," especially of diseases, but also of events, armies, etc., from epi "upon" (see epi-) + lepsis "seizure," from leps-, future stem of lambanein "take hold of, grasp" (see lemma).

Earlier was epilencie (late 14c.), from French epilence, a variant form influenced by pestilence. The native name in English was falling sickness (Old English fylleseoc, glossing epilepsia).

early 15c., "a lobe of the liver or lungs," from Medieval Latin lobus "a lobe," from Late Latin lobus "hull, husk, pod," from Greek lobos "lobe, lap, slip; vegetable pod," used of lap- or slip-like parts of the body or plants, especially "earlobe," but also of lobes of the liver or lungs, a word of unknown origin. It is perhaps related to Greek leberis "husk of fruits," from PIE *logwos. Beekes writes that the proposed connection with the PIE source of English lap (n.1)) "is semantically attractive." Extended 1670s to divisions of the brain; 1889 to ice sheets. The common notion is "rounded protruding part."

"having lobes," 1760, from Modern Latin lobatus "lobed," from lobus "a lobe" (see lobe). Related: Lobation.

also ear-lobe, "the lobe of the ear," by 1786, from ear (n.1) + lobe. Earlier was ear lap (Old English had earlæppa "external ear").

"of or pertaining to a lobe or lobes," 1839, from modern Latin lobaris, from Latin lobus (see lobe (n.)).

late 14c., "temporal power," from Late Latin temporalitas, from temporalis "of a time, but for a time" (see temporal).

extinct marine arthropod, 1820, from Modern Latin Trilobites (Walch, 1771), from Greek tri- "three" (see three) + lobos "lobe" (see lobe); so called because its body is divided into three lobes.

present-participle adjective from fall (v.). Falling star is from 1560s; falling off "decrease, declining" is from c. 1600. Falling evil "epilepsy" is from early 13c.

"timeless," 1870, from a- (3) "not" + temporal. Related: Atemporally.