moderator 1
noundomain: substance
Princeton WordNet [ver.3.1]
'%3e%3cpath%20d='M0,0%20v30%20h60%20v-30%20z'%20fill='%23012169'/%3e%3cpath%20d='M0,0%20L60,30%20M60,0%20L0,30'%20stroke='%23fff'%20stroke-width='6'/%3e%3cpath%20d='M0,0%20L60,30%20M60,0%20L0,30'%20clip-path='url(%23t)'%20stroke='%23C8102E'%20stroke-width='4'/%3e%3cpath%20d='M30,0%20v30%20M0,15%20h60'%20stroke='%23fff'%20stroke-width='10'/%3e%3cpath%20d='M30,0%20v30%20M0,15%20h60'%20stroke='%23C8102E'%20stroke-width='6'/%3e%3c/g%3e%3c/svg%3e)
EnglishDefinition
any substance used to slow down neutrons in nuclear reactors
Hypernym
inhibitor 1
noun
a substance that retards or stops an activity
Part_meronym
(physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements
EnglishHyponym
heavy water 1
noun
water containing a substantial proportion of deuterium atoms, used in nuclear reactors
Part_holonym
(physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements
