[missing link] n (1851) 1: an absent member needed to complete a series or resolve a problem
2: a hypothetical intermediate form between humans and their presumed simian progenitors
[missing link] n (1851) 1: an absent member needed to complete a series or resolve a problem
2: a hypothetical intermediate form between humans and their presumed simian progenitors
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012