Oviform

Oviform is an adjective used in biology and related disciplines to denote an egg-shaped or egg-like form. The word is derived from the Latin ovum, meaning 'egg,' combined with forma, meaning 'shape' or 'form.' The term is used descriptively to characterize the external shape of objects or structures, rather than their size or other properties.

In practice, oviform can describe a range of structures across taxa and disciplines. For example, insect eggs, seeds, pollen grains, shells, and some larval forms are described as oviform when their overall contour approximates a classical egg shape, typically with a relatively wider end and a more pointed or tapered opposite end. The term can also apply to fossils and anatomical features where precise measurements are unknown or variable.

Oviform is distinct from related terms. Oval generally refers to an elongated ellipse, while ovoid emphasizes an egg-like form but without implying any particular symmetry. Oviform specifically highlights resemblance to an egg as a whole rather than to an idealized ellipse.

Because oviform is a descriptive term, it is most useful in taxonomic descriptions and morphological comparisons where exact dimensions are less important than overall shape. It should be used alongside measurements or other identifiers when precision is required.

See also: ovoid, oval, egg-shaped.