Betazoid
- Appearance: Mammalian; black irises, otherwise largely indistinguishable from Humans
- Homeworld: Betazed
- Biological notes
- Telepathic, able to communicate directly among one another, other telepathic species
- In certain particular situations, able to communicate with non-telepathic species
- Telepathy tends to be extremely powerful as compared with other species
- Vast majority of Betazoids gain telepathic abilities upon puberty (TNG Novel: The Battle of Betazed; TNG: "Tin Man")
- Small fraction of a percent are telepathic from birth (TNG Novel: The Battle of Betazed; TNG: "Tin Man")
- Such individuals generally suffer debilitating social and psychological damage if not carefully guided due to uncontrolled and constant exposure of thoughts of the general populace (TNG Novel: The Battle of Betazed; TNG: "Tin Man")
- Small fraction of a percent are telepathic from birth (TNG Novel: The Battle of Betazed; TNG: "Tin Man")
- Telepathic abilities centered in Betazoid central cortex, mediated by psilosynine, a Betazoid neurotransmitter (TNG: "Dark Page", "Eye of the Beholder"; TNG Novel: The Battle of Betazed)
- Psilosynine levels deplete with heavy telepathic usage (TNG: "Dark Page")
- Levels can be artificially suppressed to reduce telepathic sensitivity (TNG: "Eye of the Beholder")
- Betazoid telepathic contact produces heightened activity in the subject's hippocampus (TNG Novel: Q & A)
- Telepathic, able to communicate directly among one another, other telepathic species
- Cultural notes
- Betazoid food
- Betazoid faith
- Historically, Betazoids used blowguns to defend themselves and hunt (TNG Novel: The Battle of Betazed)
- Shaft formed from the corzon plant, firing tarna thorns dipped in poison of the zintaba root (TNG Novel: The Battle of Betazed)
- Culture heavily impacted by natural strong telepathic talent throughout the population (TNG Novel: The Battle of Betazed)
- Violence and war largely abandoned centuries ago, due to natural ability to allow for mutual understanding of inner state (TNG Novel: The Battle of Betazed)
- Privacy viewed as more a lack of intrusion than a personal protection
- Few feelings or beliefs considered requiring secrecy, with little shame in sharing opinions
- Residences still tend to be built with an eye towards physical distance, to allow some telepathic quiet (TNG Novel: The Battle of Betazed)
- Lack of nudity taboo likely a result of this as well
- Betazoid society divided into noble houses
- At least five houses (TNG)
- Each house explicitly founded at some point in the past (TTN Novel: Taking Wing)
- Each designated with a number (TNG)
- Male heirs known as "Scions", female heirs known as "Daughters" (TNG Novel: The Battle of Betazed)
- At least five houses (TNG)
- Significant gifts such as dowries delivered via Betazoid gift boxes (TNG: "Haven"; DS9 Novel: The 34th Rule)
- Large metallic containers with a configurable, redesignable animatronic face speaking a pre-programmed message upon delivery (TNG: "Haven"; DS9 Novel: The 34th Rule)
- Betazoid artistic traditions include something known as a "water sculpture" (TNG Novel: A Time to Kill, A Time for War, A Time for Peace)