Glossary
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Ob-
Prefix meaning inversely.

Obconic
A solid figure with the shape of a cone; widest at the apex and pointed at the base.

Oblique
Unequal sides; slanting.

Oblong
Object with round ends and parallel margins, three times longer than wide.

Obovate
Egg-shaped with widest part above the middle.

Obovoid
A solid that is obovate in outline.

Obpyriform
Pear-shaped, with the wide end toward the apex.

Obtuse
Pointed with an angle greater than 90o. A broad pointed apex or base.

One-sided
Secund; arranged only on one side.

Open
Loose, spreading (e.g., inflorescences, with few spikelets and long branches).

Opposite
Structures that are paired at the nodes and placed one on each side of the node; stamen inserted directly in front of the petal; leaves are also opposite.

Orbicular
Approaching a circular outline.

Oval
Broadly elliptical but with rounded ends; similar to oblong, but not as long.

Ovate
Egg-shaped with the widest part below the middle

Ovulate
Bearing ovules.

Ovule
The structure within the ovary that will become the seed after fertilization.