extrusiven.
/ᵻkˈstruːsɪv/, /ɛkˈstruːsɪv/, U.S. /ɪkˈstrusɪv/, /ɛkˈstrusɪv/ Geology.
A (body of) rock formed by volcanic extrusion.
ΘΚΠ
the world > the earth > structure of the earth > structural features > volcanic formations > [noun] > rock formed by volcanic eruption
extrusive1909
1909 in Cent. Dict. Suppl.
1939 A. Johannsen Descr. Petrogr. Igneous Rocks (ed. 2) I. i. 5 In this group are also included certain other rocks which, strictly speaking, are not extrusives, namely, the pyroclastics.
1962 F. I. Ordway et al. Basic Astronautics v. 214 [Water] could be present as..water of crystallization in volcanic extrusives.
1984 Bull. Geol. Soc. Amer. 95 433 The earliest preserved extrusives..are for the most part fragmental basalts and trachytes.
This entry has not yet been fully updated (first published 1993; most recently modified version published online March 2022).
extrusiveadj.
/ᵻkˈstruːsɪv/, /ɛkˈstruːsɪv/, U.S. /ɪkˈstrusɪv/, /ɛkˈstrusɪv/ (a) Tending to extrude or thrust outwards. (b) Resulting from or characterized by extrusion. (c) Capable of being protruded.
ΘΚΠ
the world > space > shape > unevenness > projection or prominence > [adjective]
steepc1000
tooting?c1225
strutting1387
prominent?1440
extant1540
eminent?1541
pouting1563
poking1566
out1576
egregious1578
promontory1579
out-pointed1585
buttinga1593
outjetting1598
perking1598
jettying1609
juttying1609
out-jutting1611
outstanding1611
upsticking1611
out-shooting1622
jutting1624
outgrowing1625
rank1625
toting1645
projectinga1652
porrected1653
protruded1654
protruding1654
upcast1658
protending1659
jettinga1661
raised1663
starting1680
emersed1686
exerted1697
projective1703
jet-out1709
exorbitant1715
sticking1715
foreright1736
poky1754
perked-up1779
salient1789
prouda1800
overdriven1812
extrusive1816
stand-up1818
shouldering1824
jutty1827
outflung1830
sticky-out1839
sticking-up1852
outreaching1853
protrusive1858
out-thrusting1869
stickout1884
protrudent1891
the world > movement > motion in a certain direction > going or coming out > letting or sending out > [adjective] > ejecting
spewing1578
ejaculatory1655
ejective1657
extrusive1816
throw-out1870
1816 M. Keating Trav. (1817) II. 24 These hills are not..the extrusive edges of strata, but rather elevated table land.
1848 Johnston in Hist. Berwickshire Naturalists' Club 2 307 The shafts are extrusive, being pushed out like a telescope.
1886 R. A. Proctor in 19th Cent. May 693 The immense extrusive power of the volcanoes of the tertiary era.
This entry has not yet been fully updated (first published 1894; most recently modified version published online March 2022).
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n.1909adj.1816