词根词缀：plac-, placi-, -plais

【来源及含义】Latin: to please, to satisfy; peace, peacefulness; calm, calmness

【相关词根词缀】 Cross references directly, or indirectly, involving "calm, calmness, peace, quiet": pac-, peac-; quies-, quiet-; seren-.

【同源单词】complacence, complacent, complacently, complaisance, complaisant, complaisantly

词根词缀：placento-, placent-, placenta-

【来源及含义】Latin: flat cake; cakelike mass, especially the uterine organ that connects the mother to the child by way of the umbilical cord

【同源单词】fetoplacental, incarcerated placenta, placentotherapy, thermoplacentography, zonoplacental

词根词缀：plag-, plagu-, plague-

【来源及含义】Greek > Latin: strike, stroke, blow, wound; beat the chest; lament loudly [while beating the chest]; pestilence

【同源单词】black plague, bubonic plague, pestis minor, plague, plague, plagueful

词根词缀：plagi-, plagio-

【来源及含义】Greek: sideways, slanting, sloping; oblique

【同源单词】plagiocephalic, plagiocephaly, plagioclase, plagiograph, plagiotropic, plagiotropism

词根词缀：plagiar-

【来源及含义】Latin: a literary thief; "plunderer, oppressor, kidnapper" [one who "abducts the child or slave of another"]; then by extension, to take and use the thoughts, writings, etc. of someone else and represent or claim them as one's own

【同源单词】plagiarhythm, plagiarism, plagiarist, plagiaristic, plagiarization, plagiarize

词根词缀：plankto-, plankt-, -plankton

【来源及含义】Greek: passively drifting, wandering, or roaming

【相关词根词缀】Inter-related cross references, directly or indirectly, involving the "sea" and the "ocean" bodies of water: abysso- (bottomless); Atlantic; batho-, bathy- (depth); bentho- (deep, depth); halio-, halo- (salt or "the sea"); mare, mari- (sea); necto-, nekto- (swimming); oceano-; pelago- (sea, ocean); thalasso- (sea, ocean).

【同源单词】acroplankton, aeroplankton, anemoplankton, anthoplankton, astroplankton, bathyplankton

词根词缀：plano-, plan-, plani-

【来源及含义】Latin: flat, even, level, smooth

【同源单词】explain, explainable, explainer, explanation, explanatory, pedoplania

词根词缀：plano-, plan-, -plany, -plania

【来源及含义】Greek: passively drifting, wandering, or roaming; planet or planets

【相关描述】The planets are shown in this unit with images and links for details about each planet.

【相关词根词缀】 A cross reference of word units that are related, directly or indirectly, to the: "moon": Calendar, Moon Facts; Chemical Element: selenium; Gods and Goddesses; luna, luni-; Luna, the earth moon; menisc-; meno-; Planets in Motion; seleno-.

【同源单词】angioplany, aplanogamete, diplanetism, exoplanet, extrasolar planet, interplanetary

词根词缀：planta-, plant-

【来源及含义】Latin: sole of the foot; to tread down with the sole or the flat bottom or the underside of the foot; and by extension, to level the ground for sowing seeds

【相关词根词缀】 Related "foot, feet" units: melo-; ped-; podo-; -pus.

【同源单词】aquatic plant, digitoplantar, electric power plant, geographical botany, geothermal plant, medioplantar

词根词缀：plasmo-, plasm-, plast- plasma-, plasmato-, -plasmat-, -plasia, -plasis, -plasm, -plasmatic, -plasmic, -plast, -plastic, -plasy, -plasty

【来源及含义】Greek: made, molded, formed

【同源单词】abdominoplasty, anaplasty, aplasia, aplastic, arterioplasty, arthrodysplasia