single-breasted

from WordNet (r) 3.0 (2006)

single-breasted
    adj 1: (of clothing) closing with a narrow overlap and fastened
           with a single row of buttons; "a single-breasted jacket"
           [ant: {double-breasted}]

from The Collaborative International Dictionary of English v.0.48

Single-breasted \Sin"gle-breast`ed\, a.
   Lapping over the breast only far enough to permit of
   buttoning, and having buttons on one edge only; as, a
   single-breasted coast.
   [1913 Webster]

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