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oleaginous 2 |
= greasy, oily, unctuous |
texture |
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Liquid or deformably solid, cohesive, and slippery to the touch. |
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oligo… |
= few-… |
prefix |
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Indicating presence of or constitution by a relatively small number of entities of the type denoted by the term's stem; as in oligandrous, oligocellular, oligofloral, oligospermous. See also multi… (many-…, pluri…, poly…). |
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one-… |
= mono…, single-…, uni… |
prefix |
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Indicating presence of or constitution by one entity of the type denoted by the term's stem; as in one-carpelled, one-loculed, one-seeded. See also entries for particular terms beginning with this prefix whose meanings, at least in some applications, are more specific than usually indicated by such combination. |
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one-leafleted |
= single-leafleted, unifoliolate |
architecture |
foliaceous structure |
Structurally compound but with only one leaflet, whose nature (as a leaflet, not a leaf) is revealed by an evident articulation with the petiole, this condition presumably derived by evolutionary reduction from a multifoliolate precursor. |
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one-lipped |
= unilabiate; < labiate, lipped |
architecture |
perianth, calyx, corolla |
Strongly zygomorphic with connate and/or coherent members some or all of whose distal portions form one lip-like structure. |
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one-sided 1 |
= unilateral |
architecture |
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Having only one side, as compared with presumably equivalent, bilaterally symmetric structures. |
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one-sided 2 |
= unilateral |
orientation |
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Disposed or directed toward one side only. |
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one-sided 3 |
= unilateral |
insertion |
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Upon or arising from one side only of the bearing structure. |
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one-sided 3 |
= unilateral |
position |
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Upon or arising from one side only of the bearing structure. |
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one-veined |
= hyphodromous, single-veined |
venation |
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Having one median, primary vein and no other venation externally evident. |
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ontogeny |
= development |
CHARACTER |
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Mode or pattern of growth and differentiation. |
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opaque |
|
coloration |
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Not transmitting light. |
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operculate |
= lidded |
architecture |
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Having an operculum (lid). |
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operculum pl. opercula |
= lid |
STRUCTURE |
|
A distal, cover-like portion of a structure whose main body is otherwise closed, transversely discontinuous with the main body around most of the circumference, or becoming partially or wholly separate by transverse dehiscence; as of an ascidium (pitcher), pollen grain, pyxis, or sporangium (spore case). |
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opposite 1 |
|
arrangement |
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Disposed in pairs along the axis, the members of each pair inserted at the same level across from one another. |
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opposite 2 |
|
arrangement |
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Having the members of each whorl inserted directly above and/or below those of the next adjacent whorl(s). See also antipetalous, antisepalous. |
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orbicular |
= globose, globular, rotund, spheric(al), spheroid(al) |
solid shape |
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Uniformly convex, circular in any median section and in outline when viewed from any angle; like a sphere or globe. |
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orbiculate |
= round; orbicular misapplied |
plane shape |
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Circular. |
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orientation |
|
CHARACTER |
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Attitude or direction with respect to some explicit or implicit structure(s) or context. The lexicon relating to orientation includes some conceptually complex terms whose meanings also embrace aspects of structural composition or shape. Overlaps conceptually with arrangement, habit, insertion, position, and shape. |
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orthotropous |
= atropous |
orientation |
ovule |
Having the (straight) ovule sessile or funiculate and divaricate, the micropyle facing away from the ovary wall (placenta). |
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osseous |
= bony |
texture |
|
Very hard and rather brittle, like bone. |
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ostiole |
|
STRUCTURE |
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The distal aperture of a syconium (fig); in Ficus (Moraceae). |
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oval |
= elliptic(al) |
plane shape |
|
Elongate, widest at the middle, and symmetrically convex-attenuate to rounded ends. See also oblong. |
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ovary |
|
STRUCTURE |
|
The proximal portion of a pistil (either simple or compound) within which the ovules are borne; usually of somewhat greater diameter and/or volume than the remainder of the pistil. |
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ovate |
= egg-shaped |
plane shape |
|
Elongate and wholly convex, widest near a bluntly rounded base and attenuate to a narrower rounded apex; like the lateral outline of a fowl egg. See also obovate. |