Bible Dictionaries
Pentatomic

Webster's Dictionary

(1):

(a.) Having five atoms in the molecule.

(2):

(a.) Having five hydrogen atoms capable of substitution.

Bibliography Information
Webster, Noah. Entry for 'Pentatomic'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/pentatomic.html. 1828.