Term: ammonia clock: an atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule
Candidate hypernym: atomic clock: a timepiece that derives its time scale from the vibration of atoms or molecules → 1
Candidate hypernym: valve: one of the paired hinged shells of certain molluscs and of brachiopods → 0
Candidate hypernym: transmutation: (physics) the change of one chemical element into another (as by nuclear decay or radioactive bombardment) → 0
Candidate hypernym: heart disease: a disease of the heart → 0
Candidate hypernym: hundred: ten 10s → 0
Candidate hypernym: duck: flesh of a duck (domestic or wild) → 0
Candidate hypernym: indirect discourse: a report of a discourse in which deictic terms are modified appropriately (e.g., ) → 0
Candidate hypernym: nimbleness: intelligence as revealed by quickness and alertness of mind → 0
Candidate hypernym: striping: the act of marking with stripes → 0
Candidate hypernym: tinfoil: foil made of tin or an alloy of tin and lead → 0
Candidate hypernym: barrel knot: a knot used for tying fishing leaders together; the ends of the two leaders are wrapped around each other two or three times → 0