dating(redirected from Geologic dating)
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Related to Geologic dating: Isotopic dating
a. The time stated in terms of the day, month, and year: What is the date of your birth?
b. A statement of calendar time, as on a document.
a. A particular point or period of time at which something happened or existed, or is expected to happen: the date of their wedding.
b. dates The years of someone's birth and death: Beethoven's dates were 1770 to 1827.
3. The time during which something lasts; duration: "Summer's lease hath all too short a date" (Shakespeare).
4. The time or historical period to which something belongs: artifacts of a later date.
5. An appointment: a luncheon date with a client. See Synonyms at engagement.
a. An engagement to go out socially with another person, often out of romantic interest.
b. One's companion on such an outing.
7. An engagement for a performance: has four singing dates this month.
v. dat·ed, dat·ing, dates
1. To mark or supply with a date: date a letter.
2. To determine the date of: date a fossil.
3. To betray the age of: Pictures of old cars date the book.
4. To go on a date or dates with.
1. To have origin in a particular time in the past: This statue dates from 500 bc.
2. To become old-fashioned.
3. To go on dates.
out of date
No longer in style; old-fashioned: clothes that went out of date last year.
Until now: To date, only half of those invited have responded.
up to date
In or into accordance with current information, styles, or technology: brought me up to date on the project's status.
[Middle English, from Old French, from Medieval Latin data, from Latin data (Romae), issued (at Rome) (on a certain day), feminine past participle of dare, to give; see dō- in Indo-European roots.]
dat′a·ble, date′a·ble adj.
1. The sweet, edible, oblong or oval fruit of the date palm, containing a narrow, hard seed.
2. A date palm.
[Middle English, from Old French, from Old Provençal datil, from Latin dactylus, from Greek daktulos, finger, date (from its shape).]
(Chemistry) any of several techniques, such as radioactive dating, dendrochronology, or varve dating, for establishing the age of rocks, palaeontological or archaeological specimens, etc
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|Noun||1.||dating - use of chemical analysis to estimate the age of geological specimens|
chemical analysis, qualitative analysis - the act of decomposing a substance into its constituent elements
potassium-argon dating - geological dating that relies on the proportions of radioactive potassium in a rock sample and its decay product, argon
carbon dating, carbon-14 dating, radiocarbon dating - a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon-14; believed to be reliable up to 40,000 years
rubidium-strontium dating - geological dating based on the proportions of radioactive rubidium into its decay product strontium; radioactive rubidium has a half-life of 47,000,000,000 years