English dictionary: words starting with proto

Original or primitive.

Usage examples:

Prototherian

prefix

First, especially from which other similar things develop; original

Usage examples:

Protoplasm, a prototype

noun

A member of the proamphibia; an early amphibian.

noun

A chief or principal architect (now historical).

adjective

Of, relating to, or designating those books of scripture accepted into the biblical canon at an early date with little or no debate. opposed to deuterocanonical.

adjective

"protocatechuic acid" an organic acid having a structure related to, but simpler than, that of catechuic acid (catechin).

noun

A small quadrupedal dinosaur of the late cretaceous period, having a bony frill above the neck and probably ancestral to triceratops.

Usage examples:

He braved civil war, bandit armies, wolves, and sandstorms to uncover the first fossils of the prot…

adjective

(in fishes) of, relating to, or designating a tail of a primitive (or larval) type, in which the end of the vertebral column is straight and the caudal fin is symmetrical and often continuous with the dorsal and anal fins; compare "heterocercal", "homocercal".

noun

The anterior region of the brain of an arthropod.

noun

A naturally occurring photoactive precursor of chlorophyll.

noun

Any of the small marine animals belonging to the phylum hemichordata or to either of the chordate subphyla urochordata and cephalochordata, characterized (at some point in the life cycle) by a hollow dorsal nerve cord, a notochord, and gill slits; a hemichordate, urochordate, or cephalochordate, or a hypothetical ancestral form of any of these.

adjective

Of or designating a protochordate.

noun

Any of the small marine animals belonging to the phylum hemichordata or to either of the chordate subphyla urochordata and cephalochordata, characterized (at some point in the life cycle) by a hollow dorsal nerve cord, a notochord, and gill slits; a hemichordate, urochordate, or cephalochordate, or a hypothetical ancestral form of any of these.

adjective

Of or designating a protochordate.

noun

In zoantharian coelenterates, especially sea anemones and stony corals: any of the primary mesenteries, which are usually arranged in six pairs.

adjective

Of or relating to the genus protococcus.

adjective

Having the form of or resembling an alga of the genus protococcus.

noun

A genus of the family ctenocladaceae (formerly protococcaceae) of unicellular freshwater green algae, chiefly of spherical shape; (also protococcus) an alga of this genus.

noun

The official procedure or system of rules governing affairs of state or diplomatic occasions.

Usage examples:

Protocol forbids the prince from making any public statement in his defence

adjective

Relating to or governed by protocol; formal, ceremonial.

noun

The action or fact of recording, drawing up, or negotiating a protocol.

noun

A person who records protocols; a registrar, a notary; a clerk, a secretary. now chiefly historical.

verb

To record or register (information, etc.); = "protocol".

noun

The action or fact of recording, drawing up, or negotiating a protocol.

noun

The official procedure or system of rules governing affairs of state or diplomatic occasions.

Usage examples:

Protocol forbids the prince from making any public statement in his defence

noun

The embryonic shell in gastropods and certain cephalopods, often retained at the tip of the adult shell.

noun

A cusp on the anterior lingual corner of a mammalian upper molar tooth.

noun

A cusp on the anterior buccal corner of a mammalian lower molar tooth.