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accelerator mass spectrometric technique
SYNONYMS OR RELATED TERMS: AMS technique; AMS radiocarbon dating
CATEGORY: technique
DEFINITION: A relatively new method of radiocarbon dating in which the proportion of carbon isotopes is counted directly (as contrasted with the indirect Geiger counter method) using an accelerator mass spectrometer. The method drastically reduces the quantity of datable material required.
biomass
CATEGORY: flora; fauna
DEFINITION: The total weight of the plant and animal life (organic substances and organisms) existing at a given time in a given area.
lamassu
CATEGORY: artifact
DEFINITION: The colossal stone, part-human, part-animal, figures carved on the doorways of Assyrian and Achaemenid buildings, as at Nineveh. These were guardian figures.
mass
CATEGORY: measure
DEFINITION: A measure of the amount of material, independent of gravity, measured with a balance.
massebah
CATEGORY: artifact
DEFINITION: A standing stone or group of stones in the Levant similar to a dolmen. There was probably a cult purpose when erected by Canaanites (as at Gezer, Hazor). When set up by the Israelites, it was likely commemorative.
Tiemassas
CATEGORY: site
DEFINITION: Site in Senegal, south of Dakar, with extensive undated microlithic industry. There may have been successive occupation phases, including a pre-pottery phase characterized by large backed tools, geometric microliths, and hollow-based and leaf-shaped bifacial projectile points.

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