ostial, a. Anat.
(ˈɒstɪəl)
[f. ostium + -al.]
Of, pertaining to, or having an ostium or ostia; of the nature of an ostium (in an insect's heart).
| 1900 Miall & Hammond Struct. & Life Hist. Harlequin Fly 76 All the valves found in the heart of any Chironomus, whether cellular, ostial, or aortic, appear to be derived from the semicircular muscle-cells. 1910 Practitioner Jan. 51 The ostial end of the tube dilates to allow of the passage of the mole. 1969 R. F. Chapman Insects xxxii. 662 (caption) Incurrent ostial valves in the larva of Chaoborus at different phases of the heartbeat. 1969 Jrnl. Thoracic & Cardiovasc. Surg. LVII. 792/2 At autopsy all showed varying degrees of coronary ostial sclerosis with stenosis. |