ovule

/'ouvju:l/

Thân thiện

A diagram shows a plant ovule inside a flower's ovary.

Definition

1. Noun:
   • A small or immature ovum: In biology, an ovule is a small, immature egg cell in animals, particularly before it has fully developed.
   • A small body that contains the female germ cell of a plant; develops into a seed after fertilization: In botany, an ovule is the structure within the ovary of a seed plant that contains the female gametophyte. After fertilization by pollen, it develops into a seed.

Examples

• Noun:
  • The botanist examined the plant's ovule under the microscope.
  • In flowering plants, each ovule has the potential to become a seed.
  • The development of the animal ovule into a mature egg is a complex process.

Advanced Usage

• "Amphitropous ovule": A botanical term for an ovule that is curved so that the body is at a right angle to the funicle (the stalk).
• "Orthotropous ovule": A botanical term for a straight ovule where the micropyle (opening) is positioned directly opposite the funicle.
• "Unfertilized ovule": An ovule that has not undergone fertilization and will not develop into a seed.

Variants and Related Words

• Ovular (adj): Pertaining to or of the nature of an ovule.
  • The ovular structure is critical for seed formation.
• Ovulary (n): An alternative, less common term for the ovary of a plant, where ovules are contained.
• Ovulate (v): To produce or discharge an ovum from the ovary. (Note: This verb is more commonly associated with animals/releasing ova, but can be used in a botanical context for the release of an ovule precursor).
  • Some plants ovulate in response to specific environmental cues.

Synonyms

• Egg cell (for the biological sense, though "ovum" is more precise for a mature cell).
• Seed primordium (for the botanical sense, describing its future state).

Related Phrases / Compound Terms (Not Phrasal Verbs)

• Ovule culture: A laboratory technique for growing plant ovules in a sterile nutrient medium.
• Ovule abortion: The failure of an ovule to develop, often leading to it not becoming a seed.

Học thuật

Noun

1. a small or immature ovum
2. a small body that contains the female germ cell of a plant; develops into a seed after fertilization