(Canada, slang) A Canadian hundred-dollar note.

plural of Robert Borden

Alternative form of Robert Borden

plural of Sir Robert Borden

(humorous, rare) Bob's your uncle

plural of Hill-Robertson effect

A rare form of chromosomal rearrangement where the participating chromosomes break at their centromeres and the long arms fuse to form a single, large chromosome with a single centromere.

plural of Robertsonian translocation

(mineralogy) A monoclinic-prismatic mineral containing calcium, hydrogen, manganese, oxygen, and phosphorus.

(medicine) Pupils which narrow to track an object as it approaches the face, but which will not narrow in reaction to increased light ("accommodating, but not reactive"); a symptom of the neurosyphilis stage syphilis infection.