| Term | Definition | | Disinformation | False information deliberately created and shared to mislead, harm, or manipulate. It is often used to promote a specific agenda, cause panic, or make a profit. |
| Distribution | A mathematical tool that allows you to see the frequency of a given value in a large dataset. |
| DNA | DNA, or deoxyribonucleic acid, is the hereditary genetic material for most living organisms. DNA is present in cells in the form of a double-stranded helix that is composed of long strands of nucleotides. The unique sequence of nucleotides within the DNA molecule stores the genetic information. |
| Double-Blind | When neither the researcher nor the subject knows whether the subject is receiving the treatment or a placebo. "Blinding" helps reduce biased results. |
| Ecosystem | Any natural unit or entity including living and non-living parts that interact to produce a stable system through cyclic exchange of materials. |
| Efficacy Rate | A measure used to describe how effective a vaccine is at preventing disease. |
| El Nino | El Nino in its original sense, is a warm water current that periodically flows along the coast of Ecuador and Peru, disrupting the local fishery. This oceanic event is associated with a fluctuation of the intertropical surface pressure pattern and circulation in the Indian and Pacific Oceans, called the Southern Oscillation. |
| Embryology | Embryology is the branch of biology and medicine focused on the prenatal development of gametes, fertilization, and the development of embryos and fetuses. It studies the transformation of a fertilized egg into a complex, multicellular organism, covering crucial stages like cleavage, gastrulation, and organogenesis. |
| Endemic | Present in a given area, though usually at low or baseline levels. |
| Enzyme | An enzyme is a biological catalyst, usually a protein, that accelerates specific chemical reactions within living cells without being consumed in the process. By lowering activation energy, they enable essential metabolic processes - such as digestion, DNA repair, and energy production - to occur at life-sustaining rates. |
