Also found in: Thesaurus, Encyclopedia.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.antapex - the point opposite in direction from the solar apexantapex - the point opposite in direction from the solar apex; the point the solar system is moving away from
celestial point - a point in the heavens (on the celestial sphere)
apex of the sun's way, solar apex, apex - the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Mentioned in ?
References in periodicals archive ?
The antapex is rounded, and cells had well developed small knob-shaped posterior protrusions (Fig.
The abbreviations for cell measurements are as follows: Lb--body length measured from the furthest part of the epitheca to the antapex of the hypotheca, not considering appendages or processes (lists or spines); Lt--total length measured from the furthest part of the epitheca or the anterior cingular list to the furthest part of the posterior or posterior-lateral processes or lists; Db--maximum cell body depth measured in its widest part in lateral view, not considering the sulcal or cingular lists; Dt--total depth, considering the sulcal and/or cingular lists.
Cells long and thin, fusiform, with a thin "neck" and slightly sigmoid posterior part of the hypotheca, in lateral view inflated in its middle part (midbody), gradually diminishing backward, bearing two terminal spinules at the antapex, directed posteriorly.
Most species the sulcus enters the epitheca and spreads to the antapex; 3' and 4" plates may be in conjunctum, contactum or remotum positions.
Sulcus expanding to P umbonatum antapex, epitheca > hypotheca 6b.
LSL is long and narrow, ending relatively close to the antapex, with barely visible supporting ribs.
Horiguchi & Pienaar (1991) have described some variation in cell shape from diamond to ovoid, and also some variation in the sulcus to antapex length in this species, related to the development of the intercalary bands.
The hypotheca have straight sides and rounded antapex. The girdle is deeply excavated, descendent with overhanging ends, displaced by 2 to 3 times its width.
23 23a Hypotheca with two large antapical horns and deeply incised antapex ..............................................................