plural of protoneuromast

(cytology) A cell (or cluster of cells) that will develop into a neuromast

(chemistry) The graphical representation of the presence of protons (hydrogen ions) during a chemical reaction

Relating to protonemata.

(Earth's atmosphere, chiefly uncountable) Synonym of geocorona; a layer of the atmosphere. / (meteorology, plasma physics, space physics, countable) Analogs of the geocorona