moderator
[ mod-uh-rey-ter ]
/ ˈmɒd əˌreɪ tər /
noun
a person or thing that moderates.
a person who presides over a panel discussion on radio or television.
a member of an online message board or electronic mailing list with privileges and responsibilities to approve or reject messages and uphold the terms of service.
a presiding officer, as at a public forum, a legislative body, or an ecclesiastical body in the Presbyterian Church.
Physics.
a substance, as graphite or heavy water, used to slow neutrons to speeds at which they are more efficient in causing fission.
Origin of moderator
OTHER WORDS FROM moderator
mod·er·a·to·ri·al [mod-er-uh-tawr-ee-uh l, -tohr-] /ˌmɒd ər əˈtɔr i əl, -ˈtoʊr-/, adjective mod·er·a·tor·ship, nounWords nearby moderator
moderate-income,
moderation,
moderationist,
moderations,
moderato,
moderator,
modern,
modern apprenticeship,
modern art,
modern cut,
modern dance
Example sentences from the Web for moderator
British Dictionary definitions for moderator
moderator
/ (ˈmɒdəˌreɪtə) /
noun
Derived forms of moderator
moderatorship, nounScientific definitions for moderator
moderator
[ mŏd′ə-rā′tər ]
A substance, such as graphite, water, or heavy water, placed in a nuclear reactor to slow neutrons down to speeds at which they are more likely to be captured by fissionable components of a fuel (such as uranium-235) and less likely to be absorbed by nonfissionable components of a fuel (such as uranium-238). Also called neutron moderator See also slow neutron.