词根词缀：proto-, prot-

【来源及含义】Greek: first; foremost, front, earliest form of, original, primitive; chief, principal; usually used as a prefix

【同源单词】apolipoprotein, cryoprotein, fetoprotein, glycoprotein, hyperlipoproteinemia, hypolipoproteinemia

词根词缀：pruri-, prur-, prurit-

【来源及含义】Latin: itch, itching; be wanton, be eager for

【同源单词】antipruritic, aquagenic pruritus, autotoxic pruritus, bath pruritus, ocular pruritus, pruigo

词根词缀：psammo-, psamm-, psamme-

【来源及含义】Greek: sand

【同源单词】clepsammia, endopsammon, epipsammic, epipsammon, mesopsammon, pelopsammic

词根词缀：psellism-, psellismo-

【来源及含义】Greek: stammering; faltering in speech

【同源单词】psellism, psellismophobia, psellismus, psellismus haesitans, psellismus mercurialis

词根词缀：psepho-, pseph-

【来源及含义】Greek > Latin: pebble/pebbles, stone/stones; election; vote

【相关描述】To cast one's vote with a pebble, to count, reckon; from small stone, pebble [used in counting or voting]. Pebbles were used in ancient Greece for casting votes, and so psephos came to metaphorically mean, "vote".

【同源单词】isopsephic, psephism, psephite, psephocracy, psephocrat, psephograph

词根词缀：pseudo-, pseud-

【来源及含义】Greek: false, deception, lying, untrue, counterfeit; used as a prefix

【同源单词】false alarm, intermittent claudication of the cauda equina, nom de plume, polypseudonymous, precocious pseudopuberty, pseudacousma

词根词缀：psilo-, psil-

【来源及含义】Greek: bare, making bare, stripping; smooth, plain; mere, merely

【相关描述】Used by biologists and ecologists with the sense of "prairie" or "savannah"; a flat grassland in tropical or subtropical regions.

【同源单词】psilad, psilanthropist, psilanthropy, psilicole, psilodermatous, psiloi

词根词缀：psitta-

【来源及含义】Greek [psittakos-] > Latin [psittacinus-]: parrot

【同源单词】psittaceous, psittaci, psittaciformes, psittacine, Psittacosaurs, psittacosis

词根词缀：psoro-, psor-

【来源及含义】Greek: itch, mange

【相关词根词缀】 Cross references directly, or indirectly, involving the "skin": callus-; chorio-; cicatri- (scar); cori-; cuti-; hymen-; lepido- (scab, scale); papulo- (pimple); pustu- (blister, pimple); rhytid- (wrinkle); scabio- (mange, itchy); sebo- (grease, oil).

【同源单词】antipsoric, parapsoriasis, psora, psorelcosis, psorenteritis, Psorergates

词根词缀：psych-, psycho-, -psyche, -psychic, -psychical, -psychically

【来源及含义】Greek: mind, spirit, consciousness; mental processes; the human soul; breath of life; literally, "that which breathes" or "breathing"

【相关描述】A prefix that is normally used with elements of Greek origin, psych- affects the meanings of hundreds of words.

Etymologically, this element includes such meanings as, breath, to breathe, life, soul, spirit, mind, consciousness.

【相关词根词缀】Inter-related cross references, directly or indirectly, involving the "mind, mental" word units: anima-; anxi-; deliri-; hallucina-; menti-; moro-; noo-; nous; phreno-; thymo-². Word units related to breath and breathe: hal-; pneo-; pneumato-; pneumo-; spiro.

【同源单词】allopsyche, allopsychic, allopsychosis, anthropopsychism, antipsychotic, apsychia