Not as thick

• It's not so plentiful in sister's analysis
• More thinly scattered
• More empty
• Not so dense, spelling "bum" right
• More meager
• Not as dense
• Like the population of Alaska vis-à-vis New Jersey
• Not so dense

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Sparse \Sparse\, a. [Compar. Sparser ; superl. Sparsest .] [L. sparsus, p. p. of spargere to strew, scatter. Cf. Asperse , Disperse .] Thinly scattered; set or planted here and there; not being dense or close together; as, a sparse population. --Carlyle. ...