- Obtaining nourishment by the ingestion of organic material. Used chiefly of protozoans.
- Entirely like an animal in mode of nutrition; not holophytic nor saprophytic: said of some infusorians.
- Obtaining <xref>nutrition</xref>, as most <xref>animals</xref>, by the <xref>ingestion</xref> of <xref>organic</xref> matter.
- obtaining nourishment as animals do by ingesting complex organic matter