vita-, vito-, vit- +

(Latin: life, living, pertaining to life, essential to life)

hypervitaminosis D
A symptom complex resulting from ingestion of excessive amounts of vitamin D, with weakness, fatigue, loss of weight, and other negative symptoms.
hypervitaminosis, supervitaminosis
1. A condition due to the ingestion of an excess of one or more vitamins.
2. A physical disorder resulting from a nonspecific vitamin excess.
hypervitaminotic
A reference to, or characterized by, hypervitaminosis (a condition in which adverse physical effects are caused by taking in too much of one or more vitamins).
hypovitaminosis, paravitaminosis, vitanition
1. A physical disorder resulting from nonspecific vitamin deficiency.
2. A condition due to a deficiency of one or more essential vitamins.
intra vitam
During life: "The biologists were busy staining tissues intra vitam."
Lux tua vita mihi.
Your light is my life.
megavitamin
A dose of a vitamin, or vitamins, vastly exceeding the amount recommended, or required, for nutritional balance.
Mors tua, vita mea.
Your death, my life.

It also means, "You must die so that I may live." A reference to someone who can preserve his own life only by taking the life of another. For instance, it could refer to a very ill patient who is waiting for an organ transplant from a dying donor or some other situation in which a person's life is dependent upon the death of another person.

Non scholae, sed vitae discimus. (Latin statement)
Translation: "We do not learn just for school, but we learn for life." -Seneca, Jr.
oleovitamin
A solution of a vitamin in oil.
polyavitaminosis
A condition resulting from a dietary deficiency of more than one vitamin.
Quid est vita sine philosophia? (Latin question)
Translation: "What is life without philosophy?" or "What is life without a love of/for wisdom?"
revitalization
Giving new life, or vigor, to someone or something.
There are three ingredients in the good life: learning, earning, and yearning.
—Christopher Morley
revitalize (verb), revitalizes; revitalized; revitalizing
1. To give fresh life, vigor, health, or vitality to someone or something: Frank and Francis go for long walks whenever possible in order to revitalize their physical and mental abilities.
2. To restore one's strength: Edward strives to revitalize his body by changing his diet to more wholesome foods and fluids.
Tedium Vitae. (Latin phrase)
Translation: "Weariness of life."

Related life, live-word units: anima-; bio-; -cole; viva-.