proto-

a combining form meaning “first,” “foremost,” “earliest form of,” used in the formation of compound words (protomartyr; protolithic; protoplasm), specialized in chemical terminology to denote the first of a series of compounds, or the one containing the minimum amount of an element.

Also especially before a vowel, prot-.

Origin of proto-

<Greek, combining form representing prôtosfirst, superlative formed from pró;see pro-²

Words nearby proto-

prothrombin test, protist, Protista, protistology, protium, proto-, protoactinium, Proto-Algonquian, protoavis, protocal, protochordate

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for proto-

No one was using Final Cut, so it was this Proto Editing program.
Casey Affleck, Star of ‘Out of the Furnace,’ on His Hollywood Struggles|Marlow Stern|December 2, 2013|DAILY BEAST
The ferrous or proto salts have generally a greenish colour, but yield nearly colourless908 solutions, except when concentrated.
Cooley's Practical Receipts, Volume II|Arnold Cooley
The central globe shows a cross at its centre, with the four quintets whirling round it, on the proto level.
Occult Chemistry|Annie Besant and Charles W. Leadbeater
On the proto level these six atoms in each segment gather together and form a "cigar."
Occult Chemistry|Annie Besant and Charles W. Leadbeater

The central globe holds together on the proto level, but yields five meta elements.
Occult Chemistry|Annie Besant and Charles W. Leadbeater
The globe, e, is a new form, the four tetrahedra of the proto level making a single twelve-atomed one on the meta.
Occult Chemistry|Annie Besant and Charles W. Leadbeater

British Dictionary definitions for proto-

proto-

sometimes before a vowel prot-

combining form

indicating the first in time, order, or rankprotomartyr

primitive, ancestral, or originalprototype

indicating the reconstructed earliest stage of a languageProto-Germanic

indicating the first in a series of chemical compoundsprotoxide

indicating the parent of a chemical compound or an elementprotactinium

Word Origin for proto-

from Greek prōtos first, from pro before; see pro- ²

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for proto-

proto-

pref.

First in time:prototype.

First formed; primitive; original:protoplast.

Having the least amount of a specified element or radical:protoporphyrin.

单词	proto-
释义	proto- a combining form meaning “first,” “foremost,” “earliest form of,” used in the formation of compound words (protomartyr; protolithic; protoplasm), specialized in chemical terminology to denote the first of a series of compounds, or the one containing the minimum amount of an element. Also especially before a vowel, prot-. Origin of proto- <Greek, combining form representing prôtosfirst, superlative formed from pró;see pro-² Words nearby proto- prothrombin test, protist, Protista, protistology, protium, proto-, protoactinium, Proto-Algonquian, protoavis, protocal, protochordate Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for proto- No one was using Final Cut, so it was this Proto Editing program. Casey Affleck, Star of ‘Out of the Furnace,’ on His Hollywood Struggles\|Marlow Stern\|December 2, 2013\|DAILY BEAST The ferrous or proto salts have generally a greenish colour, but yield nearly colourless908 solutions, except when concentrated. Cooley's Practical Receipts, Volume II\|Arnold Cooley The central globe shows a cross at its centre, with the four quintets whirling round it, on the proto level. Occult Chemistry\|Annie Besant and Charles W. Leadbeater On the proto level these six atoms in each segment gather together and form a "cigar." Occult Chemistry\|Annie Besant and Charles W. Leadbeater The central globe holds together on the proto level, but yields five meta elements. Occult Chemistry\|Annie Besant and Charles W. Leadbeater The globe, e, is a new form, the four tetrahedra of the proto level making a single twelve-atomed one on the meta. Occult Chemistry\|Annie Besant and Charles W. Leadbeater British Dictionary definitions for proto- proto- sometimes before a vowel prot- combining form indicating the first in time, order, or rankprotomartyr primitive, ancestral, or originalprototype indicating the reconstructed earliest stage of a languageProto-Germanic indicating the first in a series of chemical compoundsprotoxide indicating the parent of a chemical compound or an elementprotactinium Word Origin for proto- from Greek prōtos first, from pro before; see pro- ² Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for proto- proto- pref. First in time:prototype. First formed; primitive; original:protoplast. Having the least amount of a specified element or radical:protoporphyrin. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
随便看	cell body cell bridge cell culture cell cycle cell division celle celled cellentani cell fusion cellhouse cell inclusion cellini cellini's halo cellist cell line cell lineage cellmate cell-mediated immune response cell-mediated immunity cell-mediated reaction cell membrane cello cellobiose celloidin cellophane