tetra-, tetr-

(Greek: four; a number used as a prefix)

tetracolon
tetractine, tetraxon, tetractinal
A spicule (small spike or needle-like body) of four equal and similar rays meeting at equal angles
tetracyclic
tetracyclis
tetrad
1. A group of four things with something in common.
2. An element having a valence or combining a power of four.
3. A group, or series, of four similar bodies, things, or people.
4. The cardinal number that is the sum of three and one.
5. A group of four parts, referring to cells produced by division in two planes, or of a chromosome in four parts in preparation for two mitotic divisions in maturation.
tetradactyl
Having only four fingers or toes on a hand or foot.
tetradactylous
1. Having four digits or claws on each extremity.
2. Having, or characterized by, four digits on a foot or hand.
tetradactyly
1. Having four digits on a limb, as with amphibians and many birds.
2. People having just four digits on a hand or foot.
tetradecapod
Having fourteen feet; belonging to the Tetradecapoda, an order of Crustaceans.
tetradenous
Inflammation of the tarsal borders of the eyelids and meibomian glands.
tetradymite
tetradynamous
tetragamy, tetragamous
1. A fourth marriage.
2. Marriage with four spouses simultaneously.
tetragenous
tetraglot

Cross references of word families that are related, partially or totally, to: "four, fourth": quadri-; quatr-; tessara-.