Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

placo-

A plate.

[Greek plax, plak-, flat plate.]

A placode in an embryo is a thickening of the ectoderm that will later develop into specialized sensory organs; a fish scale that is placoid is shaped like a plate; a placoderm (Greek derma, skin) is a fossil fish of the Devonian period, which has the front part of its body encased in broad flat bony plates; a placodont (Greek odous, odont-, tooth) is a fossil reptile of the Triassic period, which has short flat grinding palatal teeth.

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