met·ro·nome 
(mĕtrə-nōm′)
(mĕtrə-nōm′)n.
Music
Music
A device used to mark time by means of regularly recurring ticks or flashes at adjustable intervals.
[Greek metron, measure; see mē-2 in the Appendix of Indo-European roots + Greek nomos, rule, division; see nem- in the Appendix of Indo-European roots.]
metronome- beta-adrenergic antagonist
- beta-adrenergic blocker
- beta-adrenergic receptor
- beta-agonist
- beta-amyloid
- beta-blocker
- beta carotene
- beta-carotene
- beta cell
- beta decay
- beta-endorphin
- beta error
- beta globulin
- betaine
- beta interferon
- Beta Israel
- betake
- beta-lactam
- beta-lactam antibiotic
- beta-lactamase
- betamethasone
- beta-oxidation
- beta particle
- beta ray
- beta-receptor