observation observance watching | the act of observing, taking a patient look |
observation | the act of making and recording a measurement |
course session class period recitation | a regularly scheduled session as part of a course of study |
radio observation | an observation made with a radio telescope |
lookout observation tower lookout station observatory | a structure commanding a wide view of its surroundings |
observation dome | lookout consisting of a dome-shaped observatory |
observation station | a station set up for making observations of something |
period piece | any work of art whose special value lies in its evocation of a historical period |
notice observation observance | the act of noticing or paying attention, he escaped the notice of the police |
observation | facts learned by observing, he reported his observations to the mayor |
observation reflection reflexion | a remark expressing careful consideration |
period point full stop stop full point | a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations, in England they call a period a stop |
minimalism minimal art reductivism | an art movement in sculpture and painting that began in the s and emphasized extreme simplification of form and color |
lookout observation post | an elevated post affording a wide view |
meteorological observation post weather station | one of a network of observation posts where meteorological data is recorded |
menstruation menses menstruum catamenia period flow | the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause, the women were sickly and subject to excessive menstruation, a woman does not take the gout unless her menses be stopped--Hippocrates, the semen begins to appear in males and to be emitted at the same time of life that the catamenia begin to flow in females--Aristotle |
attention deficit disorder ADD attention deficit hyperactivity disorder ADHD hyperkinetic syndrome minimal brain dysfunction minimal brain damage MBD | a condition (mostly in boys) characterized by behavioral and learning disorders |
time period period of time period | an amount of time, a time period ofyears, hastened the period of time of his recovery, Picasso's blue period |
trial period test period | a period of time during which someone or something is tested |
Quaternary Quaternary period Age of Man | last million years |
Tertiary Tertiary period | from million to million years ago |
Cretaceous Cretaceous period | from million to million years ago, end of the age of reptiles, appearance of modern insects and flowering plants |
Jurassic Jurassic period | frommillion to million years ago, dinosaurs, conifers |
Triassic Triassic period | frommillion tomillion years ago, dinosaurs, marine reptiles, volcanic activity |
Permian Permian period | frommillion tomillion years ago, reptiles |
Carboniferous Carboniferous period | from million tomillion years ago |
Pennsylvanian Pennsylvanian period Upper Carboniferous Upper Carboniferous period | frommillion tomillion years ago, warm climate, swampy land |
Mississippian Missippian period Lower Carboniferous Lower Carboniferous period | from million tomillion years ago, increase of land areas, primitive ammonites, winged insects |
Devonian Devonian period Age of Fishes | frommillion to million years ago, preponderance of fishes and appearance of amphibians and ammonites |
Silurian Silurian period | from million tomillion years ago, first air-breathing animals |
Ordovician Ordovician period | from million to million years ago, conodonts and ostracods and algae and seaweeds |
Cambrian Cambrian period | from million to about million years ago, marine invertebrates |
Precambrian Precambrian eon Precambrian aeon Precambrian period | the eon following the Hadean time and preceding the Phanerozoic eon, from about , million years ago until million years ago |
period | the end or completion of something, death put a period to his endeavors, a change soon put a period to my tranquility |
neonatal period | the first days of life |
latency stage latency phase latency period | (psychoanalysis) the fourth period (from about age or until puberty) during which sexual interests are supposed to be sublimated into other activities |
day twenty-four hours twenty-four hour period -hour interval solar day mean solar day | time for Earth to make a complete rotation on its axis, two days later they left, they put on two performances every day, there are , passengers per day |
lunchtime lunch period | the customary or habitual hour for eating lunch, he observed a regular lunchtime |
gestation gestation period | the period during which an embryo develops (about days in humans) |
refractory period | (neurology) the time after a neuron fires or a muscle fiber contracts during which a stimulus will not evoke a response |
overtime period | a period of overtime play to resolve a tie, e.g. basketball |
period geological period | a unit of geological time during which a system of rocks formed, ganoid fishes swarmed during the earlier geological periods |
historic period age | an era of history having some distinctive feature, we live in a litigious age |
ice age glacial period glacial epoch | 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 |
playing period period of play play | (in games or plays or other performances) the time during which play proceeds, rain stopped play in the th inning |
first period | the first division into which the play of a game is divided |
second period | the second division into which the play of a game is divided |
final period | the final division into which the play of a game is divided |
period | (ice hockey) one of three divisions into which play is divided in hockey games |
Baroque Baroque era Baroque period | the historic period from about untilwhen the baroque style of art, architecture, and music flourished in Europe |