| bulbocavernosus reflex | A sharp contraction of the bulbocavernosus and ischiocavernosus muscles when the glans penis is suddenly compressed or tapped. (05 Mar 2000) |
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| bulboid | Bulb-shaped. Origin: bulbo-+ G. Eidos, resemblance (05 Mar 2000) |
| bulboid corpuscles | Nerve terminals in skin, mouth, conjunctiva, and other parts, consisting of a laminated capsule of connective tissue enclosing the terminal, branched, convoluted ending of an afferent nerve fibre; generally believed to be sensitive to cold. Synonym: corpuscula bulboidea, bulboid corpuscles. (05 Mar 2000) |
| bulbomimic reflex | In a case of coma from severe apoplexy, pressure on the eyeballs causes contraction of the facial muscles of expression on the side opposite to the lesion; if coma due to diabetes, uraemia, or other toxic cause the reflex is present on both sides. Synonym: facial reflex, Mondonesi's reflex. (05 Mar 2000) |
| bulbonuclear | Relating to the nuclei in the medulla oblongata. (05 Mar 2000) |
| bulbopontine | Relating to the rostral part of the rhombencephalon composed of the pons and overlying tegmentum. (05 Mar 2000) |
| bulbosacral | See: bulbosacral system. (05 Mar 2000) |
| bulbosacral system | parasympathetic part |
| bulbospinal | Relating to the medulla oblongata and spinal cord, particularly to nerve fibres interconnecting the two. Synonym: spinobulbar. (05 Mar 2000) |
| bulbourethral | Relating to the bulbus penis and the urethra. Synonym: urethrobulbar. (05 Mar 2000) |
| bulbourethral gland | One of two small compound racemose glands, that produce a mucoid secretion, lying side by side along the membranous urethra just above the bulb of the corpus spongiosum; they discharge through a small duct into the spongy portion of the urethra. Synonym: glandula bulbourethralis, Cowper's gland, Mery's gland. (05 Mar 2000) |
| bulbourethral glands | Two glands in the substance of the sphincter of the urethra, just posterior to its membranous part and located near its origin. They are homologues of bartholin's glands in the female. They supply mucus to the urethra during sexual intercourse to assist in the lubrication of coitus. (12 Dec 1998) |
| bulbous bougie | A bougie with a bulb-shaped tip, some of which are shaped like an acorn or an olive. (05 Mar 2000) |
| bulboventricular loop | The portion of the early-somite embryonic cardiac tube that evolves into the ventricle and bulbus cordis. Synonym: ventricular loop. (05 Mar 2000) |
| bulboventricular ridge | An elevation on the inner surface of the embryonic heart at four to five weeks; it indicates the division between the developing ventricles and the bulbus cordis. (05 Mar 2000) |