> as lemmas
prototoxoid
prototoxoid n.
Brit. 
/ˌprəʊtə(ʊ)ˈtɒksɔɪd/
, /ˌprəʊtə(ʊ)ˈtɒksɔɪd/U.S. /ˌproʊdoʊˈtɑkˌsɔɪd/
[after German Prototoxoid (1898 or earlier)] Medicine (now historical) a supposed non-toxic derivative of a toxin whose affinity for antitoxin is higher than that of the toxin./ˌproʊdoʊˈtɑkˌsɔɪd/ΚΠ
1904 Brit. Med. Jrnl. 10 Sept. 568 The prototoxin with the greatest avidity for the antitoxin and with the greatest toxicity..but..being comparatively labile it changes after some time into prototoxoid.
1911 Proc. Royal Soc. B. 83 511 The curious curve which toxicity..assumes, as increasing quantities of antitoxin..are added... At first it is almost flat (ascribed by Ehrlich to prototoxoid).
1975 Preventive Med. 4 227 The name ‘toxoid’ was given to nontoxic transformation products of the toxin still capable of fixation to antitoxin and manifesting an affinity for it equal to (syntotoxoid [sic]) or greater than (prototoxoid) that of the original toxin.
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as lemmas
- phototelegraphs
- phototelegraphy
- phototelephone
- phototelephony
- phototelescope
- phototheodolite
- phototherapeutic
- phototherapeutic keratectomy
- phototherapeutics
- phototherapies
- phototherapy
- photothermic
- phototimer
- phototint
- phototonic
- phototonus
- phototonuses
- phototopographer
- phototopographic
- phototopographical
- phototopographically
- phototopography
- phototoxic
- picayunity
- piccadill