Pierre and Marie Curie are best known for their pioneering work in the study of radioactivity, which led to their discovery in 1898 of the elements radium and polonium.
1 The beam of your boat is the width at the widest part of the boat.  To measure the beam, stand inside the boat and run a measuring tape from the port (left) side to the starboard (right) side at the widest section of your boat.
Define beam: a long piece of heavy often squared timber suitable for use in construction â beam in a sentence a long piece of heavy often squared timber suitable for use in construction; a wood or metal cylinder in a loom on which the warp is woundâ¦ See the full definition