fundamental measure, fundamental quantity - one of the four quantities that are the basis of systems of measurement

test period, trial period - a period of time during which someone or something is tested

time frame - a time period during which something occurs or is expected to occur; "an agreement can be reached in a reasonably short time frame"

hours - an indefinite period of time; "they talked for hours"

downtime - a period of time when something (as a machine or factory) is not operating (especially as a result of malfunctions)

uptime - a period of time when something (as a machine or factory) is functioning and available for use

work time - a time period when you are required to work

time off - a time period when you are not required to work; "he requested time off to attend his grandmother's funeral"

hospitalization - a period of time when you are confined to a hospital; "now they try to shorten the patient's hospitalization"

travel time - a period of time spent traveling; "workers were not paid for their travel time between home and factory"

time - an indefinite period (usually marked by specific attributes or activities); "he waited a long time"; "the time of year for planting"; "he was a great actor is his time"

elapsed time - the time that elapses while some event is occurring

duration, continuance - the period of time during which something continues

calendar week, week - a period of seven consecutive days starting on Sunday

field day - a time of unusual pleasure and success

lifespan, lifetime, life - the period during which something is functional (as between birth and death); "the battery had a short life"; "he lived a long and happy life"

life - the period between birth and the present time; "I have known him all his life"

life - the period from the present until death; "he appointed himself emperor for life"

millennium - a span of 1000 years

bimillenary, bimillennium - a span of 2000 years

occupation - the period of time during which a place or position or nation is occupied; "during the German occupation of Paris"

past - a earlier period in someone's life (especially one that they have reason to keep secret); "reporters dug into the candidate's past"

shelf life - the length of time a packaged food or drug will last without deteriorating

puerperium - time period following childbirth when the mother's uterus shrinks and the other functional and anatomic changes of pregnancy are resolved; "a perinatologist cared for her during the puerperium"

lactation - the period following birth during which milk is secreted; "lactation normally continues until weaning"

time of life - a period of time during which a person is normally in a particular life state

calendar day, civil day - a day reckoned from midnight to midnight

festival - a day or period of time set aside for feasting and celebration

daylight, daytime, day - the time after sunrise and before sunset while it is light outside; "the dawn turned night into day"; "it is easier to make the repairs in the daytime"

forenoon, morn, morning, morning time - the time period between dawn and noon; "I spent the morning running errands"

night, nighttime, dark - the time after sunset and before sunrise while it is dark outside

night - the time between sunset and midnight; "he watched television every night"

night - the period spent sleeping; "I had a restless night"

night - a period of ignorance or backwardness or gloom

eve - the period immediately before something; "on the eve of the French Revolution"

evening - the early part of night (from dinner until bedtime) spent in a special way; "an evening at the opera"

hebdomad, week - any period of seven consecutive days; "it rained for a week"

fortnight, two weeks - a period of fourteen consecutive days; "most major tennis tournaments last a fortnight"

weekend - a time period usually extending from Friday night through Sunday; more loosely defined as any period of successive days including one and only one Sunday

Indian summer, Saint Martin's summer - a period of unusually warm weather in the autumn

period of play, playing period, play - (in games or plays or other performances) the time during which play proceeds; "rain stopped play in the 4th inning"

period, period of time, time period - an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"

interval, time interval - a definite length of time marked off by two instants

orbit period - the time it takes to complete one full orbit around a celestial body; "the orbit period depends on the altitude of the satellite"

expelling, discharge, emission - any of several bodily processes by which substances go out of the body; "the discharge of pus"

hypermenorrhea, menorrhagia - abnormally heavy or prolonged menstruation; can be a symptom of uterine tumors and can lead to anemia if prolonged

oligomenorrhea - abnormally light or infrequent menstruation

punctuation mark, punctuation - the marks used to clarify meaning by indicating separation of words into sentences and clauses and phrases

suspension point - (usually plural) one of a series of points indicating that something has been omitted or that the sentence is incomplete

geologic time, geological time - the time of the physical formation and development of the earth (especially prior to human history)

Age of Man, Quaternary, Quaternary period - last 2 million years

Tertiary, Tertiary period - from 63 million to 2 million years ago

Cretaceous, Cretaceous period - from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants

Jurassic, Jurassic period - from 190 million to 135 million years ago; dinosaurs; conifers

Triassic, Triassic period - from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity

Permian, Permian period - from 280 million to 230 million years ago; reptiles

Carboniferous, Carboniferous period - from 345 million to 280 million years ago

Pennsylvanian, Pennsylvanian period, Upper Carboniferous, Upper Carboniferous period - from 310 million to 280 million years ago; warm climate; swampy land

Lower Carboniferous, Lower Carboniferous period, Missippian period, Mississippian - from 345 million to 310 million years ago; increase of land areas; primitive ammonites; winged insects

Age of Fishes, Devonian, Devonian period - from 405 million to 345 million years ago; dominance of fishes and appearance of amphibians and ammonites

Silurian, Silurian period - from 425 million to 405 million years ago; first air-breathing animals

Ordovician, Ordovician period - from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds

Cambrian, Cambrian period - from 544 million to about 500 million years ago; marine invertebrates

geological era, era - a major division of geological time; an era is usually divided into two or more periods

epoch - a unit of geological time

glacial epoch, glacial period, ice age - any period of time during which glaciers covered a large part of the earth's surface; "the most recent ice age was during the Pleistocene"

end, ending - the point in time at which something ends; "the end of the year"; "the ending of warranty period"