boron group

== English == === Noun === boron group (plural boron groups) (chemistry) a vertical series of elements in the periodic table that have three valence electrons; boron is a metalloid, while aluminium, gallium, indium and thallium are metals Meronyms: triel, icosagen ==== Usage notes ==== Equal to Group 3A (old style), group 13 (new style) ==== Translations ====