WordNet

put in the middle
time between the beginning and the end of a temporal period; "the middle of the war"; "rain during the middle of April"
the middle area of the human torso (usually in front); "young American women believe that a bare midriff is fashionable" (同)midriff, midsection
an intermediate part or section; "A whole is that which has beginning, middle, and end"- Aristotle
between an earlier and a later period of time; "in the middle years"; "in his middle thirties"
of a stage in the development of a language or literature between earlier and later stages; "Middle English is the English language from about 1100 to 1500"; "Middle Gaelic"
make a veinlike pattern
any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ (同)nervure
one of the horny ribs that stiffen and support the wing of an insect (同)nervure
a layer of ore between layers of rock (同)mineral vein
a blood vessel that carries blood from the capillaries toward the heart; "all veins except the pulmonary vein carry unaerated blood" (同)vena, venous blood vessel
a distinctive style or manner; "he continued in this vein for several minutes"
any commodity of intermediate quality or size (especially when coarse particles of ground wheat are mixed with bran)
having or showing markings that resemble veins (同)venose, veinlike

PrepTutorEJDIC

(空間的に)『まん中の』 / (時間・順序・数量などが)『中間の』,まん中の / 『平均の』,中ぐらいの / 《M-》(言語史で)中期の / 《the~》(場所・地域の)『まん中』,『中央』《+『of』+『名』》 / (時間・順序などの)まん中,(行為などの)最中《+『of』+『名』+(do『ing』)》 / 《話》《the~,one's~》(人の)胴,腰
〈C〉『静脈』 / 〈C〉(植物の)葉脈;(昆虫の)翅脈;(石の)石理;(木の)木目 / 〈C〉岩脈,鉱脈 / 〈U〉《しばしば a vein》(…の)傾向,性質《+of+名》 / 〈U〉《the vein》(…に対する)気分,気持ち《+for+名(doing)》
(大きさ・質・程度などが)中位の,普通の / 中ぐらいに,かなり
しも(筋)のある,筋のついた
(葉・昆虫の羽などの)脈模様,すじ