| osseous ampulla | A circumscribed dilation of one extremity of each of the three bony saemicircular canals, anterior, posterior, and lateral; each contains an ampulla of the saemicircular ducts. Synonym: ampulla ossea, osseous ampulla. (05 Mar 2000) |
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| Thoma's ampulla | A dilation of the arterial capillary beyond the sheathed artery of the spleen. (05 Mar 2000) |
| excretory ducts of lacrimal gland | The multiple (6 to 10) excretory ducts of the lacrimal gland that open into the superior fornix of the conjunctival sac. Synonym: ductuli excretorii glandulae lacrimalis, excretory ductules of lacrimal gland. (05 Mar 2000) |
| lactiferous ampulla | A circumscribed spindle-shaped dilation of the lactiferous duct just before it enters the nipple. In nursing mothers this dilatation stores a droplet of milk which is expressed by compression as the infant begins to suckle; this is thought to encourage continual suckling while the let-down reflex ensues. Synonym: sinus lactiferi, ampulla lactifera, ampulla of milk duct, lactiferous ampulla. (05 Mar 2000) |
| lactiferous ducts | The ducts, numbering 15 or 20, which drain the lobes of the mammary gland; they open at the nipple. Synonym: ductus lactiferi, canalicular ducts, galactophore, galactophorous canals, galactophorous ducts, mamillary ducts, mammary ducts, milk ducts, tubuli galactophori, tubuli lactiferi. (05 Mar 2000) |
| Luschka's ducts | Glandlike tubular structures in the wall of the gallbladder, especially in the part covered with peritoneum. (05 Mar 2000) |