1 The Architecture of Stereometric (3D) and Planimetric (2D) Geometry Language Elements in Padre (P.) Prata’s Mozambican Modern Portuguese - Emakua Dictionary – A Book Review Daniel Dinis da Costa The Pedagogical University of Mozambique’s Technical School, Department of Design and Construction danieldinisdacosta@gmail.com Abstract: This research was anticipated that would be bibliographic as yet a book review that seeks to reflect on understanding of the architecture of Prata’s (1990) Mozambican modern Portuguese-Emakuwa [– Elómwe –Meto – Chirima-Marrevone-Mulai-Naharra-Nampamela] dictionary of spatial (3D) and planimetric (2D) geometry elements. The study looks at deconstructing the concptualisation process built in and expanded in it by identifying, recording geometry knowledge and discussing candidate concepts. P. Prata’s effort to include the very essence and interpretation of the geometric elements found in dictionary of word textual meaning and sense. It more specifically (i) analyses 3D and 2D geometry language/word use; (ii) Assess the depth of mathematical/geometry content knowledge conveyed in the P. Prata’s dictionary. To realise these aims, the research questions points to: a) What are Prata’s Mozambican modern Portuguese-Emakuwa/Elómwe dictionary of spatial (3D) and planimetric (2D) geometry elements? b) How deep is the 3D geometry language elements use of meaning and sense in Prata’s dictionary? c) To what extent Prata’s Portuguese-Emakuwa/Elómwe dictionary covers the science of geometry in the Emakuwa/Elómwe and d) How 3D & 2D geometry concepts’ gaps can be identified in the Prata’s Portuguese-Emakuwa/Elómwe dictionary? Geometry is always seen as challenging and difficulty subject by the majority of students both in secondary and tertiary education. One of the reasons attributed to this phenomenon is the lack of visualization skills to mentally visualize and manipulated geometric elements. Lohman (apud. Ferreira, 2015) conceptualises spatial skills as a capacity to generate, retain and manipulate spatial abstract images. As geometry is responsible for conducting spatial forms, it is an essential discipline in most spatial dependent professions, inter-alia, engineering, geology and medicine. It is worth questioning: To what extent the Prata’s Portuguese- Emakuwa […] dictionary can be used as student support learning tool for stereometric (3D) and planimetric (2D) geometry education? To respond to this question, study employs a qualitative approach and applied in kind which was anticipated that would be a book review on mathematical language constructs and how they inform indigenous contributions to geometry content knowledge and concepts. The empirical study targets 375 pages long Prata’s Portuguese-Emakuwa dictionary and its methods of analysis comprised a critical analysis on the use, mean and sense of the 3D and 2D geometry vocabulary. Hundred A to Z translated word candidates against the backdrop of their contributory power; usability and relevance to geometry/mathematical language education were used. The emerging results show a large and deep poll of indigenous geometric content knowledge and new word entrees are suggested. Keywords: Stereometric and planimetric Geometry, Mathematical Language, Emakuwa/Elómwe. 1.INTRODUCTION This study on the architecture of the P. Prata’s (1990) Mozambican modern Portuguese- Emakuwa/Elómwe dictionary of spatial (3D) and planimetric (2D) geometry elements aims at deconstructing the conceptualisation process built and expanded in it by identifying, recording and discussing geometry conceptual information. P. Prata’s effort to include the very essence of