bulbus /bul·bus/ (bul´bus) pl. bul´bi [L.] bulb.
bul·bus (b l b s)n. pl. bul·bi (-b   ) A bulb. |
bulbus
pl. bulbi [L.] bulb.
bulbus aortae
the swollen, first part of the aorta, between the atria; swollen because of the sinuses above each of the three cusps of the aortic valves.
bulbus cordis
the outflow tract of the embryonic heart between the primitive ventricle and the aorta.
bulbus glandis
the bulb of the dog's penis; the proximal portion which enlarges greatly during erection and is the part responsible for preventing withdrawal during ejaculation.
bulbus oculi
the eyeball.
bulbus pili
see hair bulb.
bulbus rectricum
a well-organized fibroadipose mass in a muscular envelope into which the retrices (tail feathers of birds) are embedded. It occupies a trough-shaped socket bounded by the caudal vertebrae and the intrinsic tail muscles.
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