Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
B40, a hollow cage shaped molecule composed of 40 boron atoms, similar to C60 buckyballs
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
by extension, the boron allotrope, the class of spheroidal boron allotropic molecules.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
From boro- + sphere + -ene.