(orthography, printing) A semicircular diacritical mark (˘) placed above a vowel, commonly used to mark its quantity as short. / (music) A double whole note.

(biochemistry) A dehydrogenated peptide in which the -CO-NH-CHR-CO₂- groups are replaced by -CO-N=CR-CO₂-

A very small, fine electrode, most often used to study the electrical behaviour of biological cells or tissues.

Ajuga reptans (common bugle). / Ajuga genevensis (upright bugle).