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A small opening or pore, as of a fruiting body.

[Latin ōstiolum, diminutive of ōstium, opening; see ostium.]

os′ti·o′lar (ŏs′tē-ō′lər, ŏ-stī′ə-) adj.


1. (Botany) the pore in the reproductive bodies of certain algae and fungi through which spores pass
2. (Biology) any small pore
[C19: from Latin ostiolum, diminutive of ostium door]
ostiolar, ˈostioˌlate adj


(ˈɒs tiˌoʊl)

an opening or pore.
[1825–35; < Latin ōstiolum little door, diminutive of ōstium door]
os•ti•o•lar (ˈɒs ti ə lər, ɒˈstaɪ-) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ostiole - a small pore especially one in the reproductive bodies of certain algae and fungi through which spores pass
pore - any small opening in the skin or outer surface of an animal
References in periodicals archive ?
They are unique in that they have an opening called ostiole or "eye" which is not connected to the tree but helps in the development of the fruit.
melanogaster, however, were opportunistic insects, probably attracted by the volatiles released by overripe fruits, and may take advantage of free access through the ostiole and damage on the epidermis.
In the front view, the stomata in the contact region between the ostiole gave a circular aspect in both environments tested with alternative media without the addition of potassium silicate (Figure 2C, D).
onto the opening of the ostiole and without wound were not statistically different, and showed mean diameter lesions with of 3.
Results showed significant differences for the studied parameters (fruit size, fruit shape, flesh thickness, ostiole width, total soluble solids) in different cultivation areas.
Until this report, infestation of immature fruits was reported only in figs; but in this case as a consequence of figs' particular morphology in the ostiole region of their infructescences (Raga et al.
Pycnidia varying from globose to irregularly-elongated in shape, glabrous; the lower portion colorless and the walls of the cells around the slightly papillate ostiole light brown, 26-75 x 26-158 [micron]m.
Perithecia were ovoid to spherical, reddish to reddish-brown, 380-700 x 350-650[micro]m, smooth and shining, with a slightly protruding, domed and darkened apical ostiole through which ascospore were extruded in white of buff tendrils, The perithecial wall did not show a pseudoparenchymatous structure but was composed of ah intertwining network of thickened hyphae.
A cloudy gray conidial cirrhus could be seen oozing from the ostiole after 21 days.