The Collaborative International Dictionary of English v.0.48:

Pulmonary \Pul"mo*na*ry\, a. [L. pulmonarius, from pulmo, -onis,
   a lung; of uncertain origin, perh. named from its lightness,
   and akin to E. float: cf. F. pulmonaire. Cf. Pneumonia.]
   Of or pertaining to the lungs; affecting the lungs; pulmonic.
   [1913 Webster]

   Pulmonary artery. See the Note under Artery.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pulmonary artery
    n 1: one of two arteries (branches of the pulmonary trunk) that
         carry venous blood from the heart to the lungs [syn:
         pulmonary artery, arteria pulmonalis]