Pretty sure that is the scientific term
Perhaps a beam balance is the subject of your enquiry? If so, a rider beam is the beam along which one moves the small pointers till the point of balance is reached. A Triple Beam Balance will have three such beams. Coarse, medium and fine.
Mass is measured with a Triple Beam Balance. Yes it is.
Yes, the term 'balance beam' is a compoundnoun, a word made up of two or more words to form a noun with its own meaning. The noun 'balance beam' is a singular, common, concrete noun, a word for a thing.
In gymnastics, an "oak tree" on the balance beam refers to a specific pose or position where the gymnast stands tall and stable, often with arms raised or extended, resembling the strength and stability of an oak tree. This position showcases balance, poise, and control, essential qualities in gymnastics. It may also be a metaphorical term for a gymnast's ability to maintain composure and focus while performing on the beam.
A Beam balance (or Beam scale) is a device to measure weight or mass.
Girder
The scientific term for plastics is polymers.
That is precisely the scientific term: "ellipse".
Hyperopia is the scientific term. The common term is far-sightedness.
biga
The term that describe bouncing back of a beam of light from an opaque surface is "reflection."
the scientific term for hearing loss is presbycusis