Definition of Rostellum

1. n. A small beaklike process or extension of some part; a small rostrum; as, the rostellum of the stigma of violets, or of the operculum of many mosses; the rostellum on the head of a tapeworm.



Definition of Rostellum

1. Noun. A small beak-like process or extension; a small rostrum. ¹

¹ Source: wiktionary.com

Definition of Rostellum

1. a small, beaklike structure [n -LA or -LUMS]

Medical Definition of Rostellum

1. A beak-like upward extension of the stigma in orchids. (09 Oct 1997)

Rostellum Pictures

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Lexicographical Neighbors of Rostellum

rosolios
ross
ross river virus
rosselly
rosser
rossers
rossite
rossmanite
rost
rosted
rostel
rostella
rostellar
rostellate
rostelliform
rostellum (current term)
rostellums
roster
rostered
rostering
rosters
rosting
rostite
rostra
rostrad
rostral
rostral lamina
rostral layer
rostral neuropore
rostral transtentorial herniation

Literary usage of Rostellum

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Various Contrivances by which Orchids are Fertilized by Insects by Charles Darwin (1877)
"I ped. pedicel of rostellum, to which Whether we compare together the state of the rostellum in the various tribes of the ..."

2. The Orchids of New England: A Popular Monograph by Henry Ives Baldwin (1884)
"The lip has two basal lobes which curve up on each side, and these would compel an insect to approach the rostellum straight in front. As FIG. 16. ..."

3. The Various Contrivances by which Orchids are Fertilised by Insects by Charles Darwin (1904)
"Cephalanthera grandiflora ; rostellum aborted ; early penetration of the ... This Orchid is remarkable from not possessing a rostellum, which is so ..."

4. The Various Contrivances by which Orchids are Fertilized by Insects by Charles Darwin (1889)
"Gradation of organs, of the rostellum, of the pollen-masses—Formation of the ... With respect to the rostellum, no such organ exists in any other group of ..."

5. The Various Contrivances by which Orchids are Fertilized by Insects by Charles Darwin (1889)
"Gradation of organs, of the rostellum, of the pollen-masses—Formation of the ... With respect to the rostellum, no such organ exists in any other group of ..."

6. The Annals and Magazine of Natural History by William Jardine, Taylor and Francis (1854)
"He finds that the rostellum is divided by parallel septa (at right angles to the plane of that organ) into a series of longitudinally elongated loculi, ..."

7. The Tænioid Cestodes of North American Birds by Brayton Howard Ransom (1909)
"rostellum very large; suckers and posterior portion of head without spiny ... Scolex with armed rostellum 14. Scolex without rostellum, but with apical ..."

8. The Flora of British India by Joseph Dalton Hooker (1890)
"Anther behind and parallel to the termini! erect or inclined rarely horizontal rostellum. Pollinia with a simple or j double stipes, pendulous from the tip ..."

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