/ Dictionary / Index P prothesis: Meaning and Definition of Find definitions for: proth•e•sis Pronunciation: (proth'u-sis), [key] — pl. -ses the addition of a sound or syllable at the beginning of a word, as in Spanish escala “ladder” from Latin scala. Also calledproskomide.the preparation and preliminary oblation of the Eucharistic elements. the table on which this is done. the part of the sanctuary or bema where this table stands. (often cap.)a representation of a dead person lying in state. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prothallus prothonotary Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language