Dame Adelekun had 10 points for the Big Green (7-15, 4-7 Ivy League). Aaryn Rai and Garrison Wade grabbed seven rebounds apiece.
Columbia totaled 20 second-half points, a season low for the team.
Zavian McLean scored a season-high 21 points and had five steals for the Lions (4-20, 1-11), who have now lost 10 consecutive games. Robbie Stankard added nine rebounds. Geronimo Rubio De La Rosa had eight rebounds.
The Big Green improve to 2-0 against the Lions this season. Dartmouth defeated Columbia 76-63 on Jan. 29.
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