Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
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noun
A particular period of history, or of a person's life, especially one considered noteworthy or remarkable.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: age, era
Antonyms: none provided
noun
A notable event which marks the beginning of such a period.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
A specific instant in time, chosen as the point of reference or zero value of a system that involves identifying instants of time.
Definition source: English Wiktionary via Wiktextract
Topics: astronomy, chronology, computing, engineering, hobbies, horology, lifestyle, mathematics, natural-sciences, physical-sciences, sciences
Synonyms: none provided
Antonyms: none provided
noun
A geochronologic unit of hundreds of thousands to millions of years; a subdivision of a period, and subdivided into ages (or sometimes subepochs).
Definition source: English Wiktionary via Wiktextract
Topics: geography, geology, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
One complete presentation of the training data set to an iterative machine learning algorithm.
Definition source: English Wiktionary via Wiktextract
Qualifier: machine learning
Synonyms: generation
Antonyms: none provided
noun
An intensive chemotherapy regimen for treating aggressive non-Hodgkin lymphoma, consisting of etoposide, prednisolone, Oncovin (vincristine), cyclophosphamide, and hydroxydaunorubicin.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
Topics: medicine, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
verb
To divide (data) into segments by time period.
Definition source: English Wiktionary via Wiktextract
Usage: transitive
Topics: sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
a unit of geological time that is a subdivision of a period and is itself divided into ages
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: geological time, geologic time
Narrower terms: Holocene, Holocene epoch, Recent, Recent epoch, Pleistocene, Pleistocene epoch, Glacial epoch, Pliocene, Pliocene epoch, Miocene, Miocene epoch, Oligocene, Oligocene epoch, Eocene, Eocene epoch, Paleocene, Paleocene epoch
noun
a period marked by distinctive character or reckoned from a fixed point or event
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: era
Antonyms: none provided
Broader terms: time period, period of time, period
Narrower terms: day, historic period, age, modern era, Caliphate, Christian era, Common era
noun
(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: date of reference
Antonyms: none provided
Broader terms: date
History
From Medieval Latin epocha, from Ancient Greek ἐποχή (epokhḗ, “a check, cessation, stop, pause, epoch of a star, i.e., the point at which it seems to halt after reaching the highest, and generally the place of a star; hence, a historical epoch”), from ἐπέχω (epékhō, “to hold in, check”), from ἐπι- (epi-, “upon”) + ἔχω (ékhō, “to have, hold”). Doublet of epoche.
Acronym, from the initial letters of the various drugs.
Across languages
146 source translations are retained for this English entry.
