oval
Synonym discussion
Sense: adjective/1
'Oval' is the usual everyday word for something rounded but a little longer one way than the other. 'Egg-shaped' is very close, but it often suggests a shape with one end slightly narrower, so it can sound less even than 'oval'. 'Elliptical' is more formal and often appears in math, science, or careful description. 'Round' is much broader and can describe anything near a circle, so it does not clearly show the stretched shape that 'oval' does. In normal conversation, people say 'an oval table' or 'an oval face'. A teacher explaining geometry may prefer 'elliptical', while 'round' is better only when the object is almost circular.
Etymology
English borrowed 'oval' through French from Late Latin 'ovalis', a word based on Latin 'ovum', meaning 'egg'. The link to 'egg' explains why the word is used for shapes that are rounded but a little longer in one direction.